text: // content of custom_node.js
  const http = require('http')  
  const port = 1337
  
  const requestHandler = (request, response) => {  
    console.log(request.url)
    response.end('Hello Node.js Server!')
  }
  
  const server = http.createServer(requestHandler)
  
  server.listen(port, (err) => {  
    if (err) {
      return console.log('something bad happened', err)
    }
  
    console.log(`server is listening on ${port}`)
  })
  