change default server port from 3001 to 8080

server.js

@@ -150,7 +150,7 @@ io.on("connection", (socket) => {
   });
 });
 
-const PORT = process.env.PORT || 3001;
+const PORT = process.env.PORT || 8080;
 httpServer.listen(PORT, () => {
   console.log(`Server listening on port ${PORT}`);
 });