ci: Extract description from Dockerfile

.github/workflows/docker.yml

@@ -82,6 +82,16 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
+      - name: Extract description from Dockerfile
+        id: dockerfile_description
+        run: |
+          DESCRIPTION=$(grep "LABEL org.opencontainers.image.description" ${{ matrix.dockerfile }} | cut -d'"' -f2 || echo "")
+          if [ -z "$DESCRIPTION" ]; then
+            DESCRIPTION="No description provided"
+            echo "Warning: No description found in Dockerfile. Using default." >&2
+          fi
+          echo "DESCRIPTION=$DESCRIPTION" >> $GITHUB_OUTPUT
+
       - name: Build and push Docker image
         uses: docker/build-push-action@v6
         with:
@@ -93,3 +103,5 @@ jobs:
           platforms: linux/amd64,linux/arm64/v8
           cache-from: type=registry,ref=${{ steps.meta.outputs.tags }}
           cache-to: type=registry,ref=${{ steps.meta.outputs.tags }},mode=max
+          annotations: |
+            org.opencontainers.image.description=${{ steps.dockerfile_description.outputs.DESCRIPTION }}