app.post('/users', (req, res) => { const user = new User(req.body); user.save((err) => { if (err) { res.status(400).send(err); } else { res.send({ message: 'User created successfully' }); } }); });

const express = require('express'); const app = express(); const mongoose = require('mongoose');

Microservices are a software development approach that structures an application as a collection of small, independent services. Each service is responsible for a specific business capability and can be developed, tested, and deployed independently.

mongoose.connect('mongodb://localhost/productdb', { useNewUrlParser: true, useUnifiedTopology: true });