Basic Node and Express.js Server

app.js

// npm i express mongoose ejs
// in app.js
const express = require('express');
const app = express();

app.get('/', (req, res) => {
  res.send('Home Route');
});

app.listen(3000, () => {
  console.log('LISTENING ON PORT 3000');
});
// then run nodemon app.js and visit localhost:3000