Generate 500.html with assets:precompile, remove loading from Google Fonts (#5067)

config/i18n-tasks.yml

@@ -45,6 +45,7 @@ ignore_missing:
   - 'sessions.{browsers,platforms}.*'
   - 'terms.body_html'
   - 'application_mailer.salutation'
+  - 'errors.500'
 ignore_unused:
   - 'activemodel.errors.*'
   - 'activerecord.attributes.*'

config/locales/en.yml

@@ -310,6 +310,7 @@ en:
       content: Security verification failed. Are you blocking cookies?
       title: Security verification failed
     '429': Throttled
+    '500': We're sorry, but something went wrong.
     noscript_html: To use the Mastodon web application, please enable JavaScript. Alternatively, try one of the <a href="https://github.com/tootsuite/documentation/blob/master/Using-Mastodon/Apps.md">native apps</a> for Mastodon for your platform.
   exports:
     blocks: You block