feat/dual license (#550)

* ci: remove node version pin in site build workflow

* docs: clarify dual license (CC BY 4.0 for content, MIT for site code)

Alert rules and content (_data/rules.yml, dist/) are licensed under
Creative Commons CC BY 4.0. The site source code (site/) is licensed
under MIT. Both are now documented in LICENSE, site/LICENSE, the footer,
and the FAQ.

.github/workflows/site.yml

@@ -21,7 +21,6 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v6
         with:
-          node-version: 20
           cache: npm
           cache-dependency-path: site/package-lock.json
 

LICENSE

@@ -1,3 +1,39 @@
+This repository uses a dual license:
+
+- Alert rules and content (_data/rules.yml, dist/rules/, README.md):
+  Creative Commons Attribution 4.0 International (CC BY 4.0)
+  https://creativecommons.org/licenses/by/4.0/
+
+- Site source code (site/):
+  MIT License
+  https://opensource.org/licenses/MIT
+
+---
+
 Creative Commons Attribution 4.0 International License (CC BY 4.0)
 
 http://creativecommons.org/licenses/by/4.0/
+
+---
+
+MIT License (site source code)
+
+Copyright (c) 2018 Samuel Berthe
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

site/LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2018 Samuel Berthe
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

site/src/components/Footer.astro

@@ -1,7 +1,7 @@
 ---
 import { sponsors } from '../data/sponsors';
 import { getPopularServices, data, getGroupSlug } from '../data/rules';
-import { SITE_NAME, SITE_URL, GITHUB_URL, GITHUB_CONTRIBUTING_URL, GITHUB_LICENSE_URL, AUTHOR_NAME, AUTHOR_GITHUB_URL, TWITTER_HANDLE, LICENSE_CC_BY_NAME } from '../data/site';
+import { SITE_NAME, SITE_URL, GITHUB_URL, GITHUB_CONTRIBUTING_URL, GITHUB_LICENSE_URL, GITHUB_MIT_LICENSE_URL, AUTHOR_NAME, AUTHOR_GITHUB_URL, TWITTER_HANDLE, LICENSE_CC_BY_NAME, LICENSE_MIT_NAME } from '../data/site';
 
 interface Props {
   base: string;
@@ -90,7 +90,11 @@ const featuredGroups = data.groups.filter((g) => featuredGroupSlugs.includes(get
         {' '}is maintained by{' '}
         <a href={AUTHOR_GITHUB_URL} class="hover:text-brand dark:hover:text-brand-dark transition-colors">@{AUTHOR_GITHUB_URL.split('/').pop()}</a>
       </span>
-      <span>Licensed under <a href={GITHUB_LICENSE_URL} class="hover:text-brand dark:hover:text-brand-dark transition-colors">{LICENSE_CC_BY_NAME}</a></span>
+      <span>
+        Alert rules: <a href={GITHUB_LICENSE_URL} class="hover:text-brand dark:hover:text-brand-dark transition-colors">{LICENSE_CC_BY_NAME}</a>
+        {' · '}
+        Site code: <a href={GITHUB_MIT_LICENSE_URL} class="hover:text-brand dark:hover:text-brand-dark transition-colors">{LICENSE_MIT_NAME}</a>
+      </span>
     </div>
   </div>
 </footer>

site/src/data/site.ts

@@ -21,6 +21,8 @@ export const GITHUB_LICENSE_URL = `${GITHUB_URL}/blob/master/LICENSE`;
 export const LICENSE_CC_BY_URL = 'https://creativecommons.org/licenses/by/4.0/';
 export const LICENSE_CC_BY_NAME = 'Creative Commons CC BY 4.0';
 export const LICENSE_MIT_URL = 'https://opensource.org/licenses/MIT';
+export const LICENSE_MIT_NAME = 'MIT';
+export const GITHUB_MIT_LICENSE_URL = `${GITHUB_URL}/blob/master/site/LICENSE`;
 
 export const schemaAuthor = {
   '@type': 'Person',

site/src/pages/index.astro

@@ -100,7 +100,7 @@ const faqItems = [
     name: 'What is the license for these alert rules?',
     acceptedAnswer: {
       '@type': 'Answer',
-      text: `The alert rules are licensed under Creative Commons CC BY 4.0. You are free to use, adapt, and redistribute them — including in commercial environments — as long as you provide attribution. See the LICENSE file in the GitHub repository for details.`,
+      text: `The alert rules and content are licensed under Creative Commons CC BY 4.0 — you are free to use, adapt, and redistribute them, including commercially, as long as you provide attribution. The site source code is licensed under MIT. See the LICENSE file in the GitHub repository for details.`,
     },
   },
 ];