[FEATURE REQUEST] Run Init containers before a plan

[petercseh-sf]

Hi!

Please consider developing a feature for kubernetes like init containers. See:
https://kubernetes.io/docs/concepts/workloads/pods/init-containers/

So I can avoid using docker compose's horrid wait-for-it.sh scripts when I want to wait for a container to start properly before my.
https://docs.docker.com/compose/startup-order/

[Gábor KOLÁROVICS]

0.98.0 release