B4J Question SSL with docker letsencrypt-nginx-companion

This is a very special question, but maybe someone did it and can help me.
On my server all applications run in a docker container.
By using nginx and letsencrypt it handles the automated creation, renewal and use of Let's Encrypt certificates for proxyed Docker containers.
(https://hub.docker.com/r/jrcs/letsencrypt-nginx-proxy-companion/)

As i read here, i need to enable SLL or can jServer listen to two ports?

• Your host must be publicly reachable on both port 80 and 443

Now I don't know how to give the B4J server a keystore file to activate SSL.
Who knows advice?

Thanks