Update docker-image.yml (#51)

- Remove `vars.IMAGE_NAMESPACE`
- Add job-summary

.github/workflows/docker-image.yml

@@ -32,14 +32,14 @@ jobs:
       with:
         username: ${{ secrets.DOCKERHUB_USERNAME }}
         password: ${{ secrets.DOCKERHUB_TOKEN }}
-        repository: ${{ vars.IMAGE_NAMESPACE }}/${{ vars.IMAGE_NAME }}
+        repository: ${{ secrets.DOCKERHUB_USERNAME }}/${{ vars.IMAGE_NAME }}
         short-description: ${{ github.event.repository.description }}
     - 
       name: Build Docker meta data
       id: meta
       uses: docker/metadata-action@v5
       with:
-        images: ${{ vars.IMAGE_NAMESPACE }}/${{ vars.IMAGE_NAME }}
+        images: ${{ secrets.DOCKERHUB_USERNAME }}/${{ vars.IMAGE_NAME }}
         flavor: | 
           latest=${{ github.event_name == 'release' && github.event.release.prerelease == false }}
         tags: |
@@ -56,4 +56,20 @@ jobs:
         labels: ${{ steps.meta.outputs.labels }}
         cache-from: type=gha
         cache-to: type=gha,mode=max
-
+    - 
+      name: Generate job summary
+      id: job-summary
+      run: |
+        {
+          IFS=$'\n'
+          echo "### Docker metadata"
+          echo "#### Docker Labels"
+          echo '```'
+          for LINE in ${DOCKER_METADATA_OUTPUT_LABELS}; do echo "${LINE}"; done
+          echo '```'
+          echo ""
+          echo "#### Docker tags"
+          echo '```'
+          for LINE in ${DOCKER_METADATA_OUTPUT_TAGS}; do echo "${LINE}"; done
+          echo '```'
+        } >> $GITHUB_STEP_SUMMARY