Publish with annotations

Author: DRSchlaubi

.github/workflows/build.yaml

@@ -78,6 +78,12 @@ jobs:
         env: 
           TAGS: ${{ steps.meta.outputs.tags }}
         run: |
+          # Prepare annotation flags from DOCKER_METADATA_OUTPUT_LABELS
+          ANNOTATION_FLAGS=""
+          while IFS= read -r annotation; do
+            ANNOTATION_FLAGS+=" --annotation $annotation"
+          done <<< "$DOCKER_METADATA_OUTPUT_LABELS"
+
           echo "$TAGS" | while IFS= read -r tag; do
-            docker buildx imagetools create ghcr.io/trainyapp/postgres:sha-07e7eade33ccb579417c7f2a96374177eff91570-arm64 ghcr.io/trainyapp/postgres:sha-07e7eade33ccb579417c7f2a96374177eff91570-amd64 --tag=$tag
+            docker buildx imagetools create ghcr.io/trainyapp/postgres:sha-07e7eade33ccb579417c7f2a96374177eff91570-arm64 ghcr.io/trainyapp/postgres:sha-07e7eade33ccb579417c7f2a96374177eff91570-amd64 --tag=$tag $ANNOTATION_FLAGS
           done