Add Docker install support #96
Description
Is your feature request related to a problem? Please describe.
I want PKE to install Docker for me.
Describe the solution you'd like to see
Install Docker if it's not already installed on the machine.
Describe alternatives you've considered
The current alternative is to use images with pre-installed docker.
Additional context
While we prefer containerd, docker is still a requirement in some cases (eg. for GPU workloads)