How can I configure cloud9 to run grails app?

I installed gvm

and grails

in C9 Wednesday. Everything looks fine.

I start the application using the following command:

grails -Dgrails.server.host=$IP -Dgrails.server.port.https=$PORT -Dapp.context=/ run-app -https

      

        
        
        
      

    

It looks like the server is running, there is no error message.
But the app is not available at app-username.c9.io url

Has anyone been able to run a grails app on Cloud9?