clear and set the buildx context on push. Then use --push with buildx
build to push the multi-arch images immediately after creating them.
This gets around the need to store them locally (which won't work for
something like an M1 mac).
Docker-run was only useful in very specific projects. Projects should
either define their own "run" in their Makefile, add a
docker-compose.yaml, or specify instructions in the README.
Instead of putting everything in one makefile switch to a folder called
"make" with multiple makefiles. Move the original makefile to
"docker.makefile" and add kaniko and truenas to fill in later.
