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

Conflicts:
- `.github/dependabot.yml`:
  Updated upstream, we deleted it to not be flooded by Depandabot.
  Kept deleted.
- `Gemfile.lock`:
  Puma updated on both sides, went for the most recent version.
- `app/controllers/api/v1/mutes_controller.rb`:
  Upstream updated the serializer to support timed mutes, while
  glitch-soc added a custom API ages ago to get information that
  is already available elsewhere.
  Dropped the glitch-soc-specific API, went with upstream changes.
- `app/javascript/core/admin.js`:
  Conflict due to changing how assets are loaded. Went with upstream.
- `app/javascript/packs/public.js`:
  Conflict due to changing how assets are loaded. Went with upstream.
- `app/models/mute.rb`:
  🤷
- `app/models/user.rb`:
  New user setting added upstream while we have glitch-soc-specific
  user settings. Added upstream's user setting.
- `config/settings.yml`:
  Upstream added a new user setting close to a user setting we had
  changed the defaults for. Added the new upstream setting.
- `package.json`:
  Upstream dependency updated “too close” to a glitch-soc-specific
  dependency. No real conflict. Updated the dependency.

config/webpack/configuration.js

@@ -57,22 +57,9 @@ for (let i = 0; i < skinFiles.length; i++) {
   }
 }
 
-function removeOuterSlashes(string) {
-  return string.replace(/^\/*/, '').replace(/\/*$/, '');
-}
-
-function formatPublicPath(host = '', path = '') {
-  let formattedHost = removeOuterSlashes(host);
-  if (formattedHost && !/^http/i.test(formattedHost)) {
-    formattedHost = `//${formattedHost}`;
-  }
-  const formattedPath = removeOuterSlashes(path);
-  return `${formattedHost}/${formattedPath}/`;
-}
-
 const output = {
   path: resolve('public', settings.public_output_path),
-  publicPath: formatPublicPath(env.CDN_HOST, settings.public_output_path),
+  publicPath: `/${settings.public_output_path}/`,
 };
 
 module.exports = {
@@ -80,8 +67,8 @@ module.exports = {
   core,
   flavours,
   env: {
-    CDN_HOST: env.CDN_HOST,
     NODE_ENV: env.NODE_ENV,
+    PUBLIC_OUTPUT_PATH: settings.public_output_path,
   },
   output,
 };