In preparations to get some of the images to hub.docker.com/intel,
start using intel/ prefix.
Moreover, set the Makefile variables so that the images built
by make [images|demos] can easily be pushed to any registry/org
by 'docker push' (e.g., by Jenkins).
Signed-off-by: Mikko Ylinen <mikko.ylinen@intel.com>
Added alternative builder for project images: buildah
https://github.com/containers/buildah
Considering that some of our plugins use CRI-O runtime it could be
a good idea to get rid of docker as a builder. It should allow us
not to run docker daemon at all, even for build purposes.
Kubernetes also goes this way encouraging users to switch to CRI
runtimes (CRI-O and containerd), so having non-docker builds supported
looks good from this perspective too.
