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// Install Node.js from https://nodejs.org // Check version: node --version npm --version // Run a script: node server.js // server.js — basic HTTP server const http = require('http'); const server = http.createServer((req, res) => { res.writeHead(200, { 'Content-Type': 'text/html' }); if (req.url === '/') { res.end('<h1>Hello from Node.js!</h1>'); } else if (req.url === '/about') { res.end('<h1>About page</h1>'); } else { res.writeHead(404); res.end('<h1>404 Not Found</h1>'); } }); server.listen(3000, () => { console.log('Server running at http://localhost:3000'); });
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