안전한 데이터 전송을 위해 Node.js에서 HTTPS 서버를 설정하는 방법은 무엇입니까?

<code class="javascript">const express = require('express');
const https = require('https');
const fs = require('fs');

// Load the SSL certificate and key
const options = {
  key: fs.readFileSync('certificate.key'),
  cert: fs.readFileSync('certificate.crt')
};

// Create an Express application
const app = express();

// Use the HTTPS module to create an HTTPS server
const server = https.createServer(options, app);

// Start the server on a secure port (e.g., 443)
server.listen(443, () => {
  console.log('HTTPS server listening on port 443');
});</code>