buildx failed with: ERROR: failed to build: failed to solve: process "/bin/sh -c docker-registry serve /etc/docker-registry/config.yml &\n\n while ! nc -z localhost 5000; do\n sleep 0.1\n done\n\n uv run magnum-cluster-api-image-loader --insecure --repository localhost:5000\n" did not complete successfully: exit code: 1