Official Documentation for Hudu Docker with Existing NPM Setup

I am currently using Hudu Docker behind an existing NGINX Proxy Manager (NPM) setup. While I managed to get it working by following some community guides, I would greatly appreciate official documentation from Hudu. This would ensure that I am not missing any important proxy adjustments or customizations that could cause issues in the future. Having official instructions would make the setup process more reliable and less prone to errors.