How to access a docker container through a subdomain?

I’m new to cyberpanel, im looking for some help please…

I have installed a docker container and its up and running fine.

Its a self-hosted startpage for your server and can be found here on docker hub

or here on github

now i want to access this container through a url
for example


i can access it through


how do i do access this container from a sub-domain please?

Have you tried this?