build-and-push failed at docker/setup-buildx-action: the job had no /var/run/docker.sock, so buildx's docker-container driver couldn't reach the daemon. Mount the host socket into build-and-push and deploy, and replace setup-buildx + build-push-action (+ the unsupported gha cache) with a plain docker build/push against the host daemon (DooD), reusing the host's layer cache. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>