text: const http = require('http');
  const server = http.createServer((req, res) => {
    if (req.url === '/') {
      res.write('Hello World');
      res.end();
    }
  
    if (req.url === '/api/courses'){
      res.write(JSON.stringify([1,2,3]))
      res.end();
    }
  });
  
  server.listen(3000);
  
  console.log('Listening on port 3000');
  