old_contents: const express = require('express');
  const morgan = require('morgan');
  
  const app = express();
  app.use(morgan('combined'));
  app.get('/', (request, response) => {
    response.status(501).json(null);
  });
  
  const port = process.env.PORT || 8888;
  const server = app.listen(port, () => {
    console.log('Listening on port ' + server.address().port + '...');
  });
  
new_contents: const express = require('express');
  const morgan = require('morgan');
  
  const api = express.Router();
  api.get('/', (request, response) => {
    response.status(501).json(null);
  });
  
  const app = express();
  app.use(morgan('combined'));
  app.use('/api', api);
  
  const port = process.env.PORT || 8888;
  const server = app.listen(port, () => {
    console.log('Listening on port ' + server.address().port + '...');
  });
  
subject: Move the API to /api