HTTPS - Remote access

What is the problem?
Remote access in HTTPS

What did you already try to solve it?
I read a lot of books

Logs (syslog, dmesg, ... no logs, no support)
No logs cause I just don't know how to do the exposed process

Additional information about your network (Hardware you are trying to connect to, hardware you are trying to connect from, router, access point, used operating systems, ...)
2 servers behind one box. The first one is a automation server (Jeedom), the second one is Octoprint. A NAS, but not yet concerned by the HTTPS. A free certificate. A domain name.

Could someone explain to me how to access Octoprint in HTTPS.
If I'm not talking nonsense, there is no Apache server under Octoprint.
I have my own domain and sub-domains and a wildcard certificate.
I managed to switch my home automation server to HTTPS but I don't know how to do it with Octoprint.
In advance, thank you for your help.
Kind regards

Finally I changed my mind.
I gave up the idea of setting up a certificate on Octoprint and simply set up a VPN server in my home.
It works very well like that.
Have a good day.
Best regards