text: const http = require('http');
  const hostname = '127.0.0.1';
  const port = 3000;
  const server = http.createServer((req, res) => {
                                   res.statusCode = 200;
                                   res.setHeader('Content-Type', 'text/html');
                                   res.end('Hello World!\n');
                                   });
  server.listen(port, hostname, () => {
                          console.log(`Server running at http://${hostname}:${port}/`);
                        });