Now you have to configure this folder in the pluginsettings, for the parameter "Certificate folders".It's important to do this now, otherwise the certificate importscript will put the certificates in the wrong folder.
First, ensure youcreate a DNS entry for `room.your_instance.tld`, which points to your server.You can use a CNAME entry (or an A entry and a AAAA entry).This is necessary for Let's Encrypt to validate the domain for certificate generation.