In order to get the external ip address of the visitor to traefik. you need to tell docker the following...
Put the following in a file in ~/.config/systemd/user/docker.service.d/override.conf
You may need to make the docker.service.d directory
[Service]
Environment="DOCKERD_ROOTLESS_ROOTLESSKIT_PORT_DRIVER=slirp4netns"
This is required for docker to pass the client ip address to traefik.