// app.js const express = require('express'); const app = express(); const PORT = process.env.PORT || 3000; // Middleware to parse incoming JSON payloads app.use(express.json()); // HTTP GET route for the root path app.get('/', (req, res) => { res.send('Hello World!'); }); // HTTP GET route with a URL parameter app.get('/api/users/:id', (req, res) => { const userId = req.params.id; res.json({ message: `Fetching data for user ${userId}`, status: 'success' }); }); // HTTP POST route to receive data app.post('/api/data', (req, res) => { const receivedData = req.body; res.status(201).json({ message: 'Data successfully received', data: receivedData }); }); // Start the server and listen on the specified port app.listen(PORT, () => { console.log(`Server is running at http://localhost:${PORT}`); });