Hi, im trying to do a simple app using websocket and trying to test it with an online client tester https://piehost.com/websocket-tester, below are my code:

```const PORT = process.env.PORT || 3003;
const PUBLICDOMAIN = process.env.RAILWAYPUBLIC_DOMAIN;
const httpsServer = https.createServer(app);

const webSocketServer = new WebSocket.Server({ port: PORT })

httpsServer.listen(() =>
{
console.log(Server running on port ${PORT});
console.log(WebSocket URL: wss://${PUBLIC_DOMAIN});
});```

When i tried to connect to the url wss://.....[railway.app](railway.app) as pasted below it simply said i failed.
Many thanks! Im on the Free Trial plan also.