Only push image on master

Author: kotx

.github/workflows/docker-push.yml

@@ -42,6 +42,7 @@ jobs:
 
       - name: Build and push
         uses: docker/build-push-action@v5
+        if: github.ref == 'refs/heads/master'
         with:
           context: .
           platforms: linux/amd64,linux/arm64