No cert generated with docker run

[TcaManager]

Hi, I'm following this tutorial https://rancher.com/create-a-private-docker-registry-to-integrate-with-rancher/ so I change the server name and admin email in docker-run.sh and volumes/volumes/examples/simple-site/conf.d/site.example.com.conf. When I run docker-run.sh 4 containers start (not 5?) and I get nothing generated in volumes/proxy/certs except 2 symbolic links.
Did I forget something?

ls -la volumes/proxy/certs/ect-dev-reg.domain.fr/
total 16
drwxr-xr-x 2 root root 4096 févr. 26 10:51 .
drwxr-xr-x 4 root root 4096 févr. 26 10:52 ..
lrwxrwxrwx 1 root root   67 févr. 26 10:51 account_key.json -> ../accounts/acme-v02.api.letsencrypt.org/directory/default_key.json
lrwxrwxrwx 1 root root   67 févr. 26 10:51 account_reg.json -> ../accounts/acme-v02.api.letsencrypt.org/directory/default_reg.json

docker ps
CONTAINER ID        IMAGE                                    COMMAND                  CREATED             STATUS              PORTS                                      NAMES
81bb146fabf6        nginx                                    "nginx -g 'daemon of…"   14 minutes ago      Up 14 minutes       80/tcp                                     simple-site
b49762f0be25        jrcs/letsencrypt-nginx-proxy-companion   "/bin/bash /app/entr…"   14 minutes ago      Up 14 minutes                                                  vigilant_euclid
6e2735d7c79b        jwilder/docker-gen                       "/usr/local/bin/dock…"   14 minutes ago      Up 14 minutes                                                  nginx-gen
3c88869c8b86        nginx                                    "nginx -g 'daemon of…"   15 minutes ago      Up 14 minutes       0.0.0.0:80->80/tcp, 0.0.0.0:443->443/tcp   nginx