blocks to regions(like drupal) templating system for nodejs express framework

I'm using nodejs express framework. There are 2 separate express apps (auth and service), they are merged with connect npm module vhost module like this:

    // merge apps
    express.createServer()
    // subdomain parser
    .use(function(req, res, next){
      req.subdomain = getSubdomain(req.headers.host);
      next();
    })
    .use(express.vhost('auth.' + domain, authApp))
    .use(express.vhost('*.' + domain, serviceApp))
    .listen(port);

I want to make shared between apps template regions(header, sidebar, footer etc..) and fill regions with provided by apps template blocks (Something like php Drupal theme system).

How to make it better without antipatterns? Maybe there are already some useful module?