Node.js에서 HTTPS 서버를 설정하고 구성하는 방법은 무엇입니까?

var express = require('express');
var https = require('https');
var http = require('http');
var fs = require('fs');

// Define SSL options using the provided key and certificate.
var options = {
  key: fs.readFileSync('test/fixtures/keys/agent2-key.pem'),
  cert: fs.readFileSync('test/fixtures/keys/agent2-cert.cert')
};

// Create an Express application (a callback function).
var app = express();

// Create an HTTP service.
http.createServer(app).listen(80);
// Create an HTTPS service identical to the HTTP service.
https.createServer(options, app).listen(443);