5ec2b2cadc
The override pointed at a v1-era node /app/extra/healthcheck.mjs that does not exist in louislam/uptime-kuma:2, so the container was permanently unhealthy and Traefik withheld the route → the app URL 404'd despite the app running. Point at the correct binary (extra/healthcheck, WORKDIR /app) and use the image's timing (180s start_period) to avoid transient unhealthy→404 on first boot.