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

Conflicts:
- Gemfile
- app/controllers/api/v1/search_controller.rb
  Conflict because we changed the number of default results to be
  configurable
- app/lib/settings/scoped_settings.rb
  Addition of a new “noindex” site-wide setting,
  conflict due to our change of the two other site-wide settings
  (default flavour and skin instead of theme)
- spec/controllers/application_controller_spec.rb
  Addition of a new “noindex” site-wide setting,
  conflict due to our change of the two other site-wide settings
  (default flavour and skin instead of theme)

config/initializers/health_check.rb

@@ -0,0 +1,6 @@
+HealthCheck.setup do |config|
+  config.uri = 'health'
+
+  config.standard_checks = %w(database migrations cache)
+  config.full_checks = %w(database migrations cache)
+end

config/initializers/rack_attack.rb

@@ -65,7 +65,7 @@ class Rack::Attack
     req.authenticated_user_id if req.post? && req.path.start_with?('/api/v1/media')
   end
 
-  throttle('throttle_media_proxy', limit: 30, period: 30.minutes) do |req|
+  throttle('throttle_media_proxy', limit: 30, period: 10.minutes) do |req|
     req.remote_ip if req.path.start_with?('/media_proxy')
   end