[WIP] Container Providers and other fixes

[aramnhammer]

Discovery of alternative local container providers

NOTE: in the current state this is just a proof of concept to unblock me on a project, If I can get the go ahead to complete the implementation I will update this PR with the full implementation and remove this note, see todo section.

Motivation

1. I use podman on my development machine, and its api is mostly compatible with docker
2. RedHat (biased source) has a nice writeup of why to use podman
3. I like sidekick's design and want to expand it

Other changes

I discovered the image name does not include localhost/ before it when loaded into the vps, this may be a podman specific issue or its simply a bug. Since Sidekick does not support registry (that i know of), i think it makes sense to have images loaded with localhost/<imageName>

TODO

• determine local container runtime earlier (deduplicate the POC)
• support podman as a remote container provider (on the VPS)

Testing

Tested with a simple python app and my proxmox server running a VM