How to start WebClient when starting your server

You do not need to start the Web UI yourself, when you start the server it will automatically be started with the server - XAMPP is not required and you cannot host it yourself in any such way. The Web UI will listen to the port specified in the settings. The web server url needs to be configured to a domain resolving to the IP of the server (or the IP itself) and include that port, e.g. http://example.com:3001, other than if you use methods like a cloudflare tunnel or other web technology to map the port to a specific domain which would allow SSL.