Problem with Publish RestService in Sandbox

I have built a simple web service. I created the webservice based on RESTService module. The web service works if I run locally but it doesn't run in sandbox. Based on this post, I need the requesthandler configured, how can I configure it? Do I need to configure application.conf? Is there any documentation for set up the web service in sandbox?
1 answers

Actually, according to that same post, you cannot use rest services in a sandbox:

"Note that this is only possible for full cloud environments, you won't be able to publish rest webservices in a sandbox."