use branch name as the version name to be used

.github/workflows/docker-custom.yaml

@@ -51,16 +51,27 @@ jobs:
         echo "IMAGE_NAME=${IMAGE_NAME}" >> $GITHUB_ENV
         nix build .#docker-hydra-node
         ./result | docker load
+        
+        VERSION_NAME=${{github.ref_name}}
 
         BRANCH_NAME="${{ github.event.inputs.branch_name }}"
         [[ -z "${BRANCH_NAME}" ]] && { echo "branch_name is required"; exit 1; }
-
+            
         DATETIME=$(date '+%Y%m%d%H%M')
-        CUSTOM_TAG="hydra-node-${DATETIME}-${BRANCH_NAME}"
-        docker tag ${IMAGE_NAME}:unstable ${IMAGE_NAME}:${CUSTOM_TAG}
-        docker images
-        docker inspect ${IMAGE_NAME}:unstable
+        CUSTOM_TAG="${DATETIME}-${BRANCH_NAME}"
+        echo "CUSTOM_TAG=${CUSTOM_TAG}" >> $GITHUB_ENV
+        
+        # Use 'FROM' instruction to use docker build with --label
+        echo "FROM hydra-node" | docker build \
+          --label org.opencontainers.image.source=https://github.com/cardano-scaling/hydra \
+          --label org.opencontainers.image.licenses=Apache-2.0 \
+          --label org.opencontainers.image.created=$(date -Is) \
+          --label org.opencontainers.image.revision=${{github.sha}} \
+          --label org.opencontainers.image.version=${VERSION_NAME:-unstable} \
+          --tag ${IMAGE_NAME}:${CUSTOM_TAG} -
+        
+        docker inspect ${IMAGE_NAME}:${CUSTOM_TAG}
 
     - name: 📤 Push to registry
       run: |
-        docker push -a ${IMAGE_NAME}
+        docker push -a ${IMAGE_NAME}:${CUSTOM_TAG}