After installing the CTFd platform, you can set it up. It is not necessary to set it up before building the CTFd platform. The following settings are required:
- Map the platform port (9124) on the router of the internet exit.
- Map the environment port (28000-28200) on the router of the internet exit.
- Configure Whale (as shown in the image below).

Scroll down and set subdomain_host in the Frps config template [generated] to the public IP or domain name.

That's all for the settings.