make target for building and running inside a container

[vrothberg]

I'd love to have a make target to easily build and run bootc inside a container. I imagine a Containerfile that ships with all the build and test dependencies and mounts the Git tree. This way, there is a shared (and recommended?) way to test and contribute.

The built image could then also be converted to a disk image to further test it in a VM. We could even add a make target to convert the local OCI image similar to https://github.com/vrothberg/fedora-bootc-pi/blob/main/Makefile#L13.

@jeckersb @cgwalters @jmarrero what do you think?

[cgwalters]

We do have https://github.com/containers/bootc/blob/main/CONTRIBUTING.md today but yes it needs to grow a lot more

[cgwalters]

The main thing I wanted to land is containers/podman-bootc#36

[cgwalters]

This also relates to https://gitlab.com/fedora/bootc/tracker/-/issues/2