You can try docker compose with Watch tower. Then you just deploy a new branch: dev, prod. On server side counterparty you fetch updates on git, if anybody change, it will run docker compose, which will build your image and put it live.

Worked well for me a few years.

Problems: when you have issues you need to look into pertainer logs to see why it failed.

That’s one big problem, if prefer something like Jenkins to build it instead.

And if you have more groups of docker compose, you just put another sh script to do this piling on the main infrastructure git repo, which on git change will spawn new git watchers