added cypress e2e tests

backend/services/roomService.js

@@ -17,9 +17,9 @@ const getJoinableRoom = async () => {
     return await Room.findOne({ full: false, started: false }).exec();
 };
 
-const createNewRoom = data => {
+const createNewRoom = async data => {
     const room = new Room(data);
-    room.save();
+    await room.save();
     return room;
 };