Point arbitrary domains to a cloudron app?

[rosano]

How can I get a Cloudron app to receive requests without adding an alias?

For example, I would like to setup cname.myapp.cloudron.domain and allow users of the app to point their domains there (i.e. a user can make a CNAME record for sub.theirsite.com to cname.myapp.cloudron.domain).

In some way I'm asking an old question but instead of static files I want to deploy a node.js app that responds dynamically.