Netbeans Platform Application Using Plugin System

I am writing a Netbeans Platform Application. I want to provide this application to the client while in development state, and whenever there are updates in a specific module, I want to handle it in such a way that the client can use the netbeans plugin update to update the modules. So I will get a server to host different modules and also Jars signing is not a problem.

In what order should I place the modules and how can I specify which modules are updatable? How do I specify / declare the server that hosts the modules?