CAPD containers are stopped after a Docker Engine restart

[stmcginnis]

User Story

As a user I would like to be able to restart Docker Engine, either via a service restart or a whole system reboot, and have my CAPD based cluster come back after restarting without needing to start the containers manually.

Detailed Description

Docker has a container property called restartPolicy. The default policy is no, which means the container should not be restarted if it is stopped for any reason. I think the most logical policy for CAPD containers is unless-stopped, which would mean containers would always automatically restart unless the user explicitly stopped the container.

https://docs.docker.com/config/containers/start-containers-automatically/#use-a-restart-policy

/kind feature

[stmcginnis]

/assign