This guide has now moved to here https://github.com/OnniSaarni/SPT-Fika-Docker-Guide
This gist can still be used for discussion if you'd like.
Feel free to make an issue or a pull request if you'd like to contribute by expanding some sections or just otherwise contributing something to the guide.
Scripts and automated tools are welcome too if you wish to have them in the repo.
@lamduong33 I'm not sure if this is exactly what you're referring to but Bude on Fika Discord in the Fika Development channel posted yesterday how he set up a git repository for his friends to be able to easily update their mods and configs based off the master. I think once the actually backend server is set up its not too bad to update with the bash script provided above (though I haven't tested it).