This adds a new makefile target to build and publish the test database
docker image for multiple architectures. It will create images for:
- linux/amd64
- linux/arm64
The target uses docker buildx to build the images. To build the images:
docker buildx create --driver docker-container --use
make docker-buildx
docker buildx rm
See: https://docs.docker.com/buildx/working-with-buildx/