Merge commit 'c676bc91e9c3aa81eb7cfbce3c5c5e80b84d3d02' into glitch-soc/merge-upstream

Conflicts:
- `config/environments/production.rb`:
  Upstream enforced a code style change and glitch-soc had a few different lines.
  Applied upstream's code style to glitch-soc's changes.

app/helpers/admin/announcements_helper.rb

@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module Admin::AnnouncementsHelper
+  def datetime_pattern
+    '[0-9]{4}-[0-9]{2}-[0-9]{2}T[0-9]{2}(:[0-9]{2}){1,2}'
+  end
+
+  def datetime_placeholder
+    Time.zone.now.strftime('%FT%R')
+  end
+end