Welcome to DevKinsta @Michael_Luwado ! I’m happy to help. You’re right that due to it being in a sub-directory, you’ll need to do a few additional tweaks. Check out this post here on how to edit your nginx settings. You’ll need to change the root directory of where nginx should be pointing.
One issue however is that it’ll reset if the Docker container is updated or restarted. Apologies for the trouble there but do welcome feature requests!