text: const http = require('http');
  const app = require('./app');
  
  const server = http.createServer(app);
  
  // specify port the app running on
  const port = process.env.PORT || 3000;
  
  server.listen(port, () => {
    console.log('====================================');
    console.log('server is running on port ' + port);
    console.log('====================================');
  });
  