[ express + node.js ] httpsにアクセスできない

express と node.jsを使って、ssl化されたページにアクセスできるようになりたいのですができません。
何が原因でしょうか？
もしお分かりでしたらご回答よろしくお願いします。

[使用環境]
node v4.1.1
express ~4.13.1

[証明書の発行方法]

$ openssl genrsa 2048 > server.key
$ openssl req -new -key server.key > server.csr
$ openssl x509 -days 3650 -req -signkey server.key < server.csr > server.crt

[{AppName}/bin/www の設定]

#!/usr/bin/env node

/**
 * Module dependencies.
 */

var app = require('../app');
var debug = require('debug')('{AppName}:server');
var https = require('https');
var fs = require('fs');
var ssl_server_key = 'server.key';
var ssl_server_crt = 'server.crt';
var options = {
    key: fs.readFileSync(ssl_server_key),
    cert: fs.readFileSync(ssl_server_crt)
};


/**
 * Get port from environment and store in Express.
 */

var port = normalizePort(process.env.PORT || '3000');
app.set('port', port);

/**
 * Create HTTP server.
 */

var server = https.createServer(app);

/**
 * Listen on provided port, on all network interfaces.
 */

server.listen(port);
server.on('error', onError);
server.on('listening', onListening);

/**
 * Normalize a port into a number, string, or false.
 */

function normalizePort(val) {
  var port = parseInt(val, 10);

  if (isNaN(port)) {
    // named pipe
    return val;
  }

  if (port >= 0) {
    // port number
    return port;
  }

  return false;
}

/**
 * Event listener for HTTP server "error" event.
 */

function onError(error) {
  if (error.syscall !== 'listen') {
    throw error;
  }

  var bind = typeof port === 'string'
    ? 'Pipe ' + port
    : 'Port ' + port;

  // handle specific listen errors with friendly messages
  switch (error.code) {
    case 'EACCES':
      console.error(bind + ' requires elevated privileges');
      process.exit(1);
      break;
    case 'EADDRINUSE':
      console.error(bind + ' is already in use');
      process.exit(1);
      break;
    default:
      throw error;
  }
}

/**
 * Event listener for HTTP server "listening" event.
 */

function onListening() {
  var addr = server.address();
  var bind = typeof addr === 'string'
    ? 'pipe ' + addr
    : 'port ' + addr.port;
  debug('Listening on ' + bind);
}

[https://localhost:3000 アクセス結果]