Oh for sure wait for someone more knowledgeable to respond then/do your own thing. I've not yet gotten much into anything with git since I'm pretty new to all of this. Sorry for the out of place advice!

Not familiar with gogs, but SSHing into a container is usually not necessary. Should be able to SSH into the host and run docker exec -it commands instead, which is much simpler. If you absolutely have to SSH into the container it should be doable by exposing port 22 on the service and coming up as a tailnet ssh node