Merge branch 'main' into glitch-soc/merge-upstream

Conflicts:
- `README.md`:
  Minor upstream change, our README is completely different.
  Kept ours.
- `lib/tasks/assets.rake`:
  glitch-soc has extra code to deal with its theming system,
  upstream changed a line that exists in glitch-soc.
  Applied upstream changes.

app/controllers/api/v1/streaming_controller.rb

@@ -2,10 +2,10 @@
 
 class Api::V1::StreamingController < Api::BaseController
   def index
-    if Rails.configuration.x.streaming_api_base_url != request.host
-      redirect_to streaming_api_url, status: 301
-    else
+    if Rails.configuration.x.streaming_api_base_url == request.host
       not_found
+    else
+      redirect_to streaming_api_url, status: 301
     end
   end