HTTPS on homelab (just locally) - eviltoast

I want my self hosted things to use https. For example, I have Jellyfin installed via docker, and I want it to use https instead of http.

I don’t care about necessarily doing this the “right” way, as I won’t be making Jellyfin or any other service public, and will only be using it on my local network.

What is the easiest way to do this? Assume everything I host is in docker. Also a link to a tutorial would be great.

Thanks!