Add notification section to docs (#3681)

docs/backend/notification.md

@@ -0,0 +1,25 @@
+---
+title: Notifications
+---
+
+ # Notifications
+
+ Since notifications are run asynchronously, we'll want to make sure jobs are running: `bin/rails jobs:work`. If that's not running, you won't receive any notifications. You might need to create another account to pass notifications back and forth if you're doing this all through the UI.
+
+ Otherwise, you can generate notifications from the Rails console and run the class methods from `app/models/notification.rb`. For example:
+
+ ```ruby
+# follow notification
+me = User.last
+follow = User.first.follow(me)
+Notification.send_new_follower_notification_without_delay(follow)
+# reaction notification
+rxn = Reaction.create(
+ user_id: 1,
+ category: "like",
+ reactable: me.articles.last, # this assumes you have an article written
+)
+Notification.send_reaction_notification_without_delay(rxn, me)
+```
+
+ Notice you have to run these methods `without_delay`, since this is assuming jobs are not running.

docs/backend/readme.md

@@ -9,6 +9,7 @@ items:
   - pusher.md
   - admin.md
   - previewing-emails.md
+  - notifications.md
 ---
 
 # Backend Guide