Nextcloud - Collabora - Traefik - no connection with https

as long you don’t show you config nobody can help. as long you don’t fiddle with hosts files etc container are expected to use same DNS server as the host (public IP of your public DNS record by default).

maybe not the exact answer but a hint to make internal DNS resolution aka splitbraindns work for Docker Probably DNS help with NC Docker + Collabora + Wireguard tunnel - #5 by wwe