This PR adds the ability to auto-detect the container runtime tool when not explicitly specified. Prior to this, it would simply default to docker without checking to see if any other tools were installed. Now we go in order -> Docker -> Podman -> Skopeo in the event that more than one tool is installed.
Fixes #316
This PR adds the ability to auto-detect the container runtime tool when not explicitly specified. Prior to this, it would simply default to docker without checking to see if any other tools were installed. Now we go in order -> Docker -> Podman -> Skopeo in the event that more than one tool is installed.