docs: function addHost(options) {
    var sites = options.sites || [getDefaultSiteSettings(options.hostname)]; // Explicit variable for mutation later down the line
    const hostRouter = express.Router();
  
    _.each(sites, addSite.bind(null, hostRouter, options));
  
    // once all sites are added, wrap them in a vhost
    options.router.use(vhost(options.hostname, hostRouter));
  }