Fixing Dockerfile for podman too

[andreabenini]

Your Dockerfile, while absolutely fine, is too tightened to docker only.
You're assuming the default registry (docker.io) and the default namespace (library).
With a simple line modification you can have it working without issues with docker and podman too.
Many of us are not allowed to use docker for licensing issues (docker is not free) and others simply don't want to have it around because podman has different benefits (license, rootless, daemon free, ...).
As a CNCF suggestion it's also welcomed if you'd like to change the filename from Dockerfile to Containerfile in the future which seems to be more permissive and friendly for other engines too (lxd, containerd, ...).

[vercel]

@andreabenini is attempting to deploy a commit to the dottle's projects Team on Vercel.

A member of the Team first needs to authorize it.

[1ilit]

Thank you!