You can achieve what you need just by running the same command couple of times (change port & container name). Compose would help and there should be no problem to create one (pull requests are welcome
Saying that, if you really want to automate things - use Helm Charts to deploy to K8.
By not having latest your deployment is safe from auto-upgrade (and potentially from breaking changes), but I see what you mean.
Cheers!
Dmitry