Websocket: apparently this needs to be the full URL

frontend/src/components/App.tsx

@@ -180,7 +180,9 @@ const App: React.FC = () => {
     }
   }, [fetchPlaylist, fetchNowPlaying, fetchFavorites]);
 
-  useWebSocket('/api/events', {
+  const wsUrl = `${window.location.protocol === 'https:' ? 'wss:' : 'ws:'}//${window.location.host}/api/events`;
+  console.log('Connecting to WebSocket at', wsUrl);
+  useWebSocket(wsUrl, {
     onOpen: () => {
       console.log('WebSocket connected');
     },