[Glitch] Fix webpack warnings due to unhandled extensions (`LICENCE` and `README.md`)

Port 730e2127e1 to glitch-soc

Signed-off-by: Claire <claire.github-309c@sitedethib.com>

app/javascript/flavours/glitch/common.js

@@ -2,7 +2,7 @@ import Rails from '@rails/ujs';
 import 'font-awesome/css/font-awesome.css';
 
 export function start() {
-  require.context('@/images/', true);
+  require.context('@/images/', true, /\.(jpg|png|svg)$/);
 
   try {
     Rails.start();