Add SaaS subscription to docker app

Hi,

I’m trying to find a way to add subscription/usage/monetization to my application. I have an enterprise web application that runs on-premises as a docker image. I need to add subscription enforcement. Building this by had is probably 30% extra of what it took to make the application itself.

I wanted to find out if there is some way to do that on the “image” level or if someone knows of a system that can do this that integrates with docker that would be great!