chore(ci): conditional if for main/prod branch

.github/workflows/backend-mage-pipeline.yaml

@@ -55,19 +55,21 @@ jobs:
         run: |
           docker image ls -a | grep starter-game-template
       - name: Docker save local build images
+        if: startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main'
         run: |
           docker save ${{ github.event.repository.name }}-nakama:latest | gzip > /tmp/${{ github.event.repository.name }}-nakama-latest.tar.gz
           docker save ${{ github.event.repository.name }}-cardinal:latest | gzip > /tmp/${{ github.event.repository.name }}-cardinal-latest.tar.gz
           docker save ${{ github.event.repository.name }}-testsuite:latest | gzip > /tmp/${{ github.event.repository.name }}-testsuite-latest.tar.gz
       - name: Upload local build images to temporary artifact
+        if: startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main'
         uses: actions/upload-artifact@v3
         with:
           name: buildimage
           path: /tmp/starter-game-template-*.tar.gz
   images-release:
     runs-on: ubuntu-latest
     needs: mage-build-test
-#    if: startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main'
+    if: startsWith(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/main'
     defaults:
       run:
         shell: bash