Azure Cloud Shell

Question

For writing, running, and debugging code with just a browser, and a sample Node.js Web App as in the following Code Snippet:

const express = require('express');

const app = express();
const port = 3000;

app.get('/', (req, res) => {
  res.send("Node.js Version: " + process.version + "\n");
});

app.listen(port, () => {
  console.log(`Server started on port: ${port}`);
});

Azure Cloud Shell Output:

$ curl http://localhost:3000
Node.js Version: v16.20.2

Azure Cloud Shell Web Preview opens: https://ux.console.azure.com//proxy/3000/ only to show this error:

Cannot GET /proxy/3000/

After the following steps:

1. Configure port to preview Valid ports include [1025-8079] and [8091-49151]

2. 3000

3. Open and browse

What's missing?