Add Feeds help page

app/flatpages/help.md

@@ -18,6 +18,7 @@ toc: False
 * [Contact Us](contact_us/)
 * [Top Packages Algorithm](top_packages/)
 * [Featured Packages](featured/)
+* [Feeds](feeds/)
 
 ## Help for Package Authors
 

app/flatpages/help/feeds.md

@@ -0,0 +1,15 @@
+title: Feeds
+
+You can follow updates from ContentDB in your RSS feed reader. If in doubt, copy the Atom URL.
+
+* All events: [Atom]({{ url_for('feeds.all_atom') }}) | [JSONFeed]({{ url_for('feeds.all_json') }})
+* New packages: [Atom]({{ url_for('feeds.packages_all_atom') }}) | [JSONFeed]({{ url_for('feeds.packages_all_json') }})
+* New releases: [Atom]({{ url_for('feeds.releases_all_atom') }}) | [JSONFeed]({{ url_for('feeds.releases_all_json') }})
+
+## Package feeds
+
+Follow new releases for a package:
+
+```
+https://content.minetest.net/packages/AUTHOR/NAME/releases_feed.atom
+```