fix(gha): Add workflow tag debugging step and fix tag (#140)

.github/workflows/datahub-actions-docker.yml

@@ -26,7 +26,7 @@ jobs:
       # The tracking tag will be "head", "v1.2.3", or "pr1234".
       # The unique tag will be a short SHA.
       unique_tag: ${{ steps.tag.outputs.unique_tag }}
-      tracking_tag: ${{ steps.tag.outputs.tag }}
+      tracking_tag: ${{ steps.tag.outputs.tracking_tag }}
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -41,8 +41,10 @@ jobs:
           TRACKING_TAG=$(echo ${GITHUB_REF} | sed -e "s,refs/heads/main,head,g" -e 's,refs/tags/,,g' -e 's,refs/pull/\([0-9]*\).*,pr\1,g')
           echo "TRACKING_TAG: $TRACKING_TAG"
 
-          echo "unique_tag=$UNIQUE_TAG" >> "$GITHUB_OUTPUT"
-          echo "tracking_tag=$TRACKING_TAG" >> "$GITHUB_OUTPUT"
+          {
+            echo "unique_tag=${UNIQUE_TAG}"
+            echo "tracking_tag=${TRACKING_TAG}"
+          } >> $GITHUB_OUTPUT
       - name: Check whether publishing enabled
         id: publish
         env:
@@ -64,6 +66,11 @@ jobs:
     steps:
       - name: Check out the repo
         uses: actions/checkout@v4
+      - name: Setup Outputs
+        run: |
+          echo "GITHUB_REF: $GITHUB_REF"
+          echo "unique_tag=${{ needs.setup.outputs.unique_tag }}"
+          echo "tracking_tag=${{ needs.setup.outputs.tracking_tag }}"
       - name: Docker meta
         id: docker_meta
         uses: docker/metadata-action@v5
@@ -101,6 +108,11 @@ jobs:
     steps:
       - name: Check out the repo (slim)
         uses: actions/checkout@v3
+      - name: Setup Outputs
+        run: |
+          echo "GITHUB_REF: $GITHUB_REF"
+          echo "unique_tag=${{ needs.setup.outputs.unique_tag }}"
+          echo "tracking_tag=${{ needs.setup.outputs.tracking_tag }}"
       - name: Docker meta (slim)
         id: docker_meta_slim
         uses: docker/metadata-action@v5