Nginx and Letsencrypt

I have installed Spreed webRTC application and done letsencrypt certificate for the same.

When I try to enter with https://server-name, I can able to access spreed webrtc application.
I want to restrict the application when entering https:///server-name should not be able to access.
Instead of direct DNS name(https:///server-name), I want to use only with room names (https:///server-name/ravi).

Can anybody help me in this.