Add annotations via "build-and-push.outputs"

Author: edoardob90

.github/workflows/docker-build.yml

@@ -67,3 +67,5 @@ jobs:
           push: ${{ github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name == github.repository }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
+          outputs: |
+            type=image,name=ghcr.io/${{ github.repository }},push-by-digest=false,name-canonical=false,push=true,annotation-index.org.opencontainers.image.description="A containerized Python tutorial environment with Jupyter Lab.",annotation-index.org.opencontainers.image.source="https://github.com/${{ github.repository }}",annotation-index.org.opencontainers.image.authors="Empa Scientific IT <scientificit@empa.ch>",annotation-index.org.opencontainers.image.licenses="MIT"