Main index.js file

index.js

const express = require('express');
const mongoose = require('mongoose');
const bodyParser = require('body-parser');
const router = require('./router');
const app = express();

mongoose
  .connect('mongodb://localhost:27017/node_api')
  .then(() => console.log('Connected to database'));

app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

app.use('/products', router);

app.listen(3000, () => console.log('App is running on port 3000'));