Automatically update forks

In my instance of Gitea I have some mirror’s but in most of the cases I want to be able to make a simple change (mostly in the docker file, and now with gitea actions create a .gitea folder and automatically buid/push a container) to a repo and after that keep it automatically up to date. I found out that I need to create a mirror of the original repo and then create a fork of it to be able to change those settings. But after that I need to make manually PR’s and merge them. Is there any way to automate that (and maybe notify on an conflict)? maybe with gitea actions ? or is there already some script? I can’t imagine , I’m the only one wanting this.