feat: add support for exporter-level comments (#481)

dist/template.yml

@@ -2,9 +2,13 @@ groups:
 {% assign groupName = slug | split: '-' %}{% capture groupNameCamelcase %}{% for word in groupName %}{{ word | capitalize }} {% endfor %}{% endcapture %}
 - name: {{ groupNameCamelcase | remove: ' ' | remove: '-' }}
 
+  {% assign lines = comments | split: "
+" %}{% for line in lines %}# {{ line | strip }}
+  {% endfor %}
   rules:
 {% for rule in rules %}{% assign ruleName = rule.name | split: ' ' %}{% capture ruleNameCamelcase %}{% for word in ruleName %}{{ word | capitalize }} {% endfor %}{% endcapture %}
-    {% for comment in comments %}# {{ comment | strip }}
+    {% assign lines = rule.comments | split: "
+" %}{% for line in lines %}# {{ line | strip }}
     {% endfor %}- alert: {{ ruleNameCamelcase | remove: ' ' }}
       expr: '{{ rule.query }}'
       for: {% if rule.for %}{{ rule.for }}{% else %}0m{% endif %}

rules.md

@@ -62,6 +62,7 @@
 // @TODO: Please contribute => https://github.com/samber/awesome-prometheus-alerts 👋
 {% endhighlight %}
         {% else %}
+{{ exporter.comments | strip | newline_to_br }}
 {% highlight bash %}
 $ wget https://raw.githubusercontent.com/samber/awesome-prometheus-alerts/master/dist/rules/{{ service.name | replace: " ", "-" | downcase }}/{{ exporter.slug }}.yml
 {% endhighlight %}