1. Moved description label to docker-bake.hcl. Image descriptions must be specified here. See: https://docs.github.com/en/packages/working-with-a-github-packages-registry/working-with-the-container-registry#adding-a-description-to-multi-arch-images 2. Moved specifying the 'Dockerfile' to 'common'. 3. Changed it so the gpu-fs and gcn-fpu images only built to linux/amd64. arm64 doesn't work.