Hi static-file-server gurus, I apologize in advance if I've missed existing support. But it would be helpful with [healthcheck](https://docs.docker.com/compose/compose-file/compose-file-v3/#healthcheck) support for container monitoring, examples of approaches from other Go projects; [Prometheus](https://prometheus.io/docs/prometheus/latest/command-line/promtool/#promtool-check-healthy) and [Traefik](https://doc.traefik.io/traefik/operations/cli/#healthcheck).