DEV: Re-enable uglifier for non-precompiled assets

Keep `harmony` disabled

config/environments/production.rb

@@ -14,6 +14,8 @@ Discourse::Application.configure do
   # Disable Rails's static asset server (Apache or nginx will already do this)
   config.public_file_server.enabled = GlobalSetting.serve_static_assets || false
 
+  config.assets.js_compressor = :uglifier
+
   # stuff should be pre-compiled
   config.assets.compile = false