code: function start (settings) {
  
    settings = settings || {};
  
    // Populate security values with the corresponding files.
    if (settings.secure) {
      settings.passphrase = settings.passphrase || '1234';
      settings.key = settings.key || 'https.key';
      settings.cert = settings.cert || 'https.crt';
      settings.ca = settings.ca || [];
    }
  
    settings.port = settings.port || (settings.secure ? 443 : 80);
  
    return startServer(settings);
  }
docs: Each camp instance creates an HTTP / HTTPS server automatically.