How to add a https-certificates of my domain in jitsi Meet?

I have the jits installed and it works locally but to be able to access from another network I need to add my own certificate from my domain. How do you do it?

It’s needed. Domainname.crt.pem And domain name.key.pem?

And in which address and file name the certificates for jitsi Meet are added. Jitsi is installed in debian
Web server is nginx.