Change application UI on external Server

Hi there i only find Tutorials about how to use SWAGGER Api on a local Machine and using the localhost Adress for that matter. I want to use it from an external server which uses a specific domain. I have already put that Swagger Tool on that Server and can call it locally on that server but i don't know  how to access it with an IP or DNS from another place.

Do i have to create a specific Web Page Folder oder Subdomain to put it in?

Do i just have to change launchSettings applicatoin url ?