Setting up the express web server - simplest way

package.json

{
  "name": "express-web-server",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1",
    "start": "node simpleRoute.js"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.17.1"
  }
}

simpleRoute.js

const express = require('express');
let app = express();
const port = 3009;
app.listen(port, () => console.log(`listening on ${port}`));