[Feature Request] Remove container/node, detect and trigger a cmon remove node job

[alex-s9s]

Support removing a container from the command line

docker stop galera4
docker rm galera4

Try to use dump-init to capture and proxy signals to the entrypoint scripts in order to take appropriate actions.

https://engineeringblog.yelp.com/2016/01/dumb-init-an-init-for-docker.html
https://github.com/Yelp/dumb-init