If all you need is init (and not a process supervisor), docker comes with one called 'tini' built in. All you have to do is supply `--init` to the `docker run` command. Or use `init: true` in your docker-compose.yaml.

As far as a different process supervisor, I'm not sure. I've used supervisord and agree it's kind of awkward. I have heard of these but don't know much about them:

https://smarden.org/runit/

https://github.com/nicolas-van/multirun

https://github.com/just-containers/s6-overlay