Hello! I’m sorry to hear that it caused you a lot of trouble, I didn’t expect that, but I also am not running my Mattermost installation with Docker.
I suggest following the Official Documentation to set up the Nginx reverse proxy, as it generally is going to work. However, if there are any issues you experience with getting it set up, please don’t hesitate to continue this thread or open a new topic, I’ll be glad to help out!