This is a simple web server from the original Node.js source: # Create a file named app.js const http = require('http'); const hostname = '127.0.0.1'; const port = 3000; const server = http.createServer((req, res) => { res.statusCode = 200; res.setHeader('Content-Type', 'text/plain'); res.end('Hello World'); }); server.listen(port, hostname, () => { console.log(`Server running at http://${hostname}:${port}/`); }); Then, run it with this command: `node app.js`. Visit http://localhost:3000 and you will see a message saying "Hello World".