Step by step to create NodeJS Express local server

create_express_server.js

/*
1. Add express
$ npm install express --save

2. Add cors
$ npm install cors --save

3. On Windows, add new firewall rule to allow receive request on PORT
*/

// 4. Configure and start server 
let express = require('express')
let cors = require('cors')

let app = express()
app.use(cors())
app.use(express.static('./public'))

// Use port opened on firewall
app.listen(80)