node web hello-world

index.js

const http = require('http')

const host = '0.0.0.0'
const port = 3000

const server = http.createServer((req, res) => {
  res.statusCode = 200
  res.setHeader('Content-Type', 'text/plain')
  res.end('Hello World!')
})

server.listen(port, host, () => {
  console.log('Web server running at http://%s:%s', host, port)
})