Meteor-up with proxy pass for subdomains?

Has anyone managed to get a setup where you use one Meteor app, but two URLs to work?

I.e, I wish to use a setup where the main app is at example.com and it generates a REST API at example.com/api.
I also wish to route a subdomain called api to api.example.com and use it as a mask or simply pass parameters to the example.com/api?

Using meteor-up btw.