TRAEFIK_CONTAINER_IP=172.27.0.16 # This is the traefik container ip in the traefik_default network. I configured the traefik container with a static IP so this does not have to be changed anymore.
# This is the IP of the Trafik container. This changes if the traefik container restarts. If it is not the current traefik container IP collabora does not work. Check the current traefik container IP with: docker inspect traefik and get the IP from the Networks -> traefik_default -> IPAddress section