diff --git a/overrides/main.html b/overrides/main.html
index 94d9808..402de72 100644
--- a/overrides/main.html
+++ b/overrides/main.html
@@ -1 +1,16 @@
 {% extends "base.html" %}
+
+{% block extrahead %}
+  {{ super() }}
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+{% endblock %}
+
+{% block scripts %}
+  {{ super() }}
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+{% endblock %}
diff --git a/site/20-slice/index.html b/site/20-slice/index.html
index 642bc82..8a5827c 100644
--- a/site/20-slice/index.html
+++ b/site/20-slice/index.html
@@ -93,6 +93,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="../assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -1200,8 +1207,12 @@
     <script id="__config" type="application/json">{"base": "..", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="../assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file
diff --git a/site/28-maps-memory-leaks/index.html b/site/28-maps-memory-leaks/index.html
index a1f61ef..9dd5148 100644
--- a/site/28-maps-memory-leaks/index.html
+++ b/site/28-maps-memory-leaks/index.html
@@ -93,6 +93,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="../assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -1211,8 +1218,12 @@
     <script id="__config" type="application/json">{"base": "..", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="../assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file
diff --git a/site/404.html b/site/404.html
index 103abf1..e7cd4e7 100644
--- a/site/404.html
+++ b/site/404.html
@@ -61,6 +61,13 @@
     
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
   </head>
   
   
@@ -959,8 +966,12 @@
     <script id="__config" type="application/json">{"base": "/", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "/assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="/assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   </body>
 </html>
\ No newline at end of file
diff --git a/site/5-interface-pollution/index.html b/site/5-interface-pollution/index.html
index a1d5d6e..d3c063a 100644
--- a/site/5-interface-pollution/index.html
+++ b/site/5-interface-pollution/index.html
@@ -93,6 +93,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="../assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -1460,8 +1467,12 @@
     <script id="__config" type="application/json">{"base": "..", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="../assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file
diff --git a/site/56-concurrency-faster/index.html b/site/56-concurrency-faster/index.html
index e46c33a..a72a623 100644
--- a/site/56-concurrency-faster/index.html
+++ b/site/56-concurrency-faster/index.html
@@ -93,6 +93,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="../assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -1362,8 +1369,12 @@
     <script id="__config" type="application/json">{"base": "..", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="../assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file
diff --git a/site/89-benchmarks/index.html b/site/89-benchmarks/index.html
index 5c90728..7f7c1db 100644
--- a/site/89-benchmarks/index.html
+++ b/site/89-benchmarks/index.html
@@ -93,6 +93,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="../assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -1504,8 +1511,12 @@
     <script id="__config" type="application/json">{"base": "..", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="../assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file
diff --git a/site/9-generics/index.html b/site/9-generics/index.html
index a32df71..c3b2cb6 100644
--- a/site/9-generics/index.html
+++ b/site/9-generics/index.html
@@ -93,6 +93,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="../assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -1361,8 +1368,12 @@
     <script id="__config" type="application/json">{"base": "..", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="../assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file
diff --git a/site/92-false-sharing/index.html b/site/92-false-sharing/index.html
index 1520582..19f08ce 100644
--- a/site/92-false-sharing/index.html
+++ b/site/92-false-sharing/index.html
@@ -93,6 +93,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="../assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -1197,8 +1204,12 @@
     <script id="__config" type="application/json">{"base": "..", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="../assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file
diff --git a/site/98-profiling-execution-tracing/index.html b/site/98-profiling-execution-tracing/index.html
index 129c092..a851140 100644
--- a/site/98-profiling-execution-tracing/index.html
+++ b/site/98-profiling-execution-tracing/index.html
@@ -93,6 +93,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="../assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -1550,8 +1557,12 @@ world” is executed, which occupies the four CPU cores for approximately 40 ms.
     <script id="__config" type="application/json">{"base": "..", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="../assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file
diff --git a/site/book/index.html b/site/book/index.html
index cd43cd2..7f92d88 100644
--- a/site/book/index.html
+++ b/site/book/index.html
@@ -93,6 +93,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="../assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -1228,8 +1235,12 @@
     <script id="__config" type="application/json">{"base": "..", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="../assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file
diff --git a/site/chapter-1/index.html b/site/chapter-1/index.html
index d3000fe..c2aafc3 100644
--- a/site/chapter-1/index.html
+++ b/site/chapter-1/index.html
@@ -93,6 +93,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="../assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -1397,8 +1404,12 @@
     <script id="__config" type="application/json">{"base": "..", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="../assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file
diff --git a/site/external/index.html b/site/external/index.html
index 025e3ee..db361dd 100644
--- a/site/external/index.html
+++ b/site/external/index.html
@@ -91,6 +91,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="../assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -1516,8 +1523,12 @@
     <script id="__config" type="application/json">{"base": "..", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="../assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file
diff --git a/site/index.html b/site/index.html
index 503f52c..b9ce415 100644
--- a/site/index.html
+++ b/site/index.html
@@ -93,6 +93,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -5385,8 +5392,12 @@ the use case. However, we should see the two options as complementary. </p>
     <script id="__config" type="application/json">{"base": ".", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file
diff --git a/site/ja/index.html b/site/ja/index.html
index 1bc8182..ba46457 100644
--- a/site/ja/index.html
+++ b/site/ja/index.html
@@ -93,6 +93,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="../assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -5002,8 +5009,12 @@
     <script id="__config" type="application/json">{"base": "..", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="../assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file
diff --git a/site/pt-br/index.html b/site/pt-br/index.html
index d4616ff..cfc4beb 100644
--- a/site/pt-br/index.html
+++ b/site/pt-br/index.html
@@ -93,6 +93,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="../assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -5387,8 +5394,12 @@ the use case. However, we should see the two options as complementary. </p>
     <script id="__config" type="application/json">{"base": "..", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="../assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file
diff --git a/site/sitemap.xml.gz b/site/sitemap.xml.gz
index 2da534e..318257e 100644
Binary files a/site/sitemap.xml.gz and b/site/sitemap.xml.gz differ
diff --git a/site/zh/index.html b/site/zh/index.html
index ced18ee..79d1575 100644
--- a/site/zh/index.html
+++ b/site/zh/index.html
@@ -93,6 +93,13 @@
       
     
     
+  
+  <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
+        new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
+      j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
+      'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
+  })(window,document,'script','dataLayer','GTM-WTPX6GZT');</script>
+
    <link href="../assets/stylesheets/glightbox.min.css" rel="stylesheet"/><style>
     html.glightbox-open { overflow: initial; height: 100%; }
     .gslide-title { margin-top: 0px; user-select: text; }
@@ -3633,8 +3640,12 @@
     <script id="__config" type="application/json">{"base": "..", "features": ["navigation.tabs", "navigation.tabs.sticky", "search.highlight", "search.share", "search.suggest", "content.code.copy", "navigation.expand", "navigation.sections", "announce.dismiss", "toc.follow", "content.code.annotate", "content.tooltips"], "search": "../assets/javascripts/workers/search.b8dbb3d2.min.js", "translations": {"clipboard.copied": "Copied to clipboard", "clipboard.copy": "Copy to clipboard", "search.result.more.one": "1 more on this page", "search.result.more.other": "# more on this page", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents", "search.result.placeholder": "Type to start searching", "search.result.term.missing": "Missing", "select.version": "Select version"}}</script>
     
     
+  
       <script src="../assets/javascripts/bundle.8fd75fb4.min.js"></script>
       
     
+  <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-WTPX6GZT"
+                  height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
+
   <script>document$.subscribe(() => {const lightbox = GLightbox({"touchNavigation": true, "loop": false, "zoomable": true, "draggable": true, "openEffect": "zoom", "closeEffect": "zoom", "slideEffect": "slide"});})</script></body>
 </html>
\ No newline at end of file