Discovery or Ecommerce modification

I am using a tutor installed Open Edx Platform.

I want to modify the templates available on my discovery.<domain>.com and also modify how my ecommerce looks like.

Since the discovery is installed only through a tutor plugin, the plugin is what’s inside the lms docker container. But the whole discovery container is outside the lms docker container. So if I create a django app in my lms docker container, I can’t import the models from the discovery app. And even if we assume that it works, the models I create on my django app will be present on the <domain>.com not in my `

Same goes with the ecommerce plugin. How can I modify the behavior and appearance of my discovery and ecommerce?