If you are using Apache as a reverse proxy and want to handle the ssl there you can just remove traefik and configure Apache to pass the request on through mod_proxy (I think that is what it is called).
We should probably make that a bit clearer, I have not seen the install docs for a while so I am not sure what we say but I will see if I can get that sorted.
Maybe a warning can be add like “Dont try it with IP address, only try this with domain and subdomain”
Because I first try to do the setup only with the IP address and SSL didnt worked, afterwards I used the domain and subdomain and I setup again. Then it worked.
It is Lets Encrypt so the cert is only valid for 90 days but the acme client in Traefik will auto renew it. There is some information on what Traefik does here: Traefik Let's Encrypt Documentation - Traefik