[FEA] add workflow to build and push a matrix of docker images

[trxcllnt]

• https://github.com/marketplace/actions/build-and-push-docker-images
• https://github.com/docker/build-push-action/blob/master/docs/advanced/cache.md
• https://github.com/docker/build-push-action/blob/master/docs/advanced/local-registry.md

[bryevdv]

LGTM!