Refactor News documentation with mkdocs and mkdocs-material

- move all pages to new structure
- use gh-pages to host html version
- use github actions for automatic build

Co-authored-by: anoy <anoymouserver+github@mailbox.org>

Signed-off-by: Benjamin Brahmer <info@b-brahmer.de>

1 files changed, 16 insertions, 0 deletions

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+# Custom CSS
+Sometimes you want to add additional CSS for a feed to improve the rendering. This can very easily be done by adding a CSS class to **css/custom.css** following the following naming convention:
+
+* Take the URL from the \<link> attribute (e.g.: \<link>https://www.google.de/path?my=query \</link>)
+* Extract the Domain from the URL (e.g.: www.google.de)
+* Strip the leading **www.** (e.g.: google.de)
+* Replace all . with - (e.g.: google-de)
+* Prepend **custom-** (e.g.: custom-google-de)
+
+Each class rule should be prefixed with **#app-content** and should only affect the article body. An example rule would be:
+
+```css
+#app-content .custom-google-de .body {
+    /* Custom CSS rules here */
+}
+```
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