Update docker-hub.yml

Author: viferga

.github/workflows/docker-hub.yml

@@ -81,6 +81,8 @@ jobs:
           version: v${{ env.BUILDKIT_VERSION }}
 
       - name: Login to Docker Hub
+        # Only run when master or when tagging a version
+        if: (github.ref == 'refs/heads/master' || startsWith(github.ref, 'refs/tags/')) && github.event_name != 'pull_request'
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKER_HUB_USERNAME }}