title: How to get FullURL with NestJS?
body: <p>How do I get the full URL of the page that NestJS is processing?
  (e.g. http://localhost:3000/hoge)</p>
  <pre><code>// 
  // If you implement it with express, it looks like this.
  // e.g. http://localhost:3000/hoge
  // 
  function getFullUrl(req: express.Request) {
    return `${req.protocol}://${req.get('Host')}${req.originalUrl}`;
  }
  </code></pre>