Using certificates from remote reverse proxy (traefik)?

[x ] I have read intro post: About the Installation Issues category
[ x] I have read the tutorials, help and searched for similar issues

Is it possible to forward the certificates managed by a traefik instance to a passbolt instance running on another machine?
The example Auto configure HTTPS with Let’s Encrypt on Docker seams to use a traefik instance running on the same machine/docker host.
I’d like to setup traefik running in a gateway, managing the certificates from letsencrypt. Other applications, such as passbolt, run on computers behind the gateway.
If its possible how would a passbolt configuration look like?