Hi guys. I'm running my traefik proxy based on this example successfully for 2 months. However, seems that it won't update certs automatically cause 60 days mark passed.
You need to assign a certresolver to entrypoint or router, both is not necessary.
Enable and check Traefik debug log (doc) and Traefik access log in JSON format (doc).
LetsEncrypt TLS certificate renewal should happen when the certificate has 30 days or less remaining before expiry. To manually trigger a cert check (and renewal), its probably easiest to restart Traefik, also to see the according debug messages.