ci: 🎡 use cache (gha) when building the docker images
Hopefully it will fit in the 10GB.

See
https://github.com/docker/build-push-action/blob/master/docs/advanced/cache.md#cache-backend-api
and https://github.com/moby/buildkit/tree/master#github-actions-cache-experimental
ci: 🎡 use cache (gha) when building the docker images: Hopefully it will fit in the 10GB.

See
https://github.com/docker/build-push-action/blob/master/docs/advanced/cache.md#cache-backend-api
and https://github.com/moby/buildkit/tree/master#github-actions-cache-experimental