Testing is complete!! And a nice build runner script to boot

backend/routes/room/[roomCode]/ping.dart

@@ -0,0 +1,10 @@
+import 'package:backend/service/db_access.dart';
+import 'package:dart_frog/dart_frog.dart';
+
+Future<Response> onRequest(RequestContext context, String roomCode) async {
+  final gameRoom = await Db.getRoomByCode(roomCode);
+  if (gameRoom == null) {
+    return Response(statusCode: 404);
+  }
+  return Response(statusCode: 200);
+}