My installation
For the docker I created a new port container port 80 host port 446 since Apache is not ssl
I followed instructions here
https://blog.linuxserver.io/2017/05/10/installing-nextcloud-on-unraid-with-letsencrypt-reverse-proxy/
The only difference was since this apache instance that is created does not use ssl in my letsencrypt proxy_pass must be http:/ not https:/
That got me up and running however I had an issue with the ONLYOFFICE document editing service address
When I tried to edit a document I saw an error that said "onlyOFFICE cannot be reached. Please contact admin"
Go to your settings -> ONLYOFFICE (under Administration)
Make sure the address is correct.
Currently it's all up and running.