server.js

// import express
const express = require('express')
   app = express()
   port = process.env.port || 3000

// configure application

// set routes
app.get("/" , (req,res) => {
   res.send("hello")
   res.end()
})

// listen port
app.listen(port , () => {
   console.log(`Da chay server thanh cong ${port}`)
})