Connection unsecure with Cloudflare Tunnel

[Life from Scratch]

The exit node being my Cloudclared container? That's what I figured was going on. So how do I get an SSL certificate to use HTTPS between the exit node and Jellyfin to get rid of the unsecured connection warning? All the documentation for using Certbot assumes that there's a webserver involved. Can I assume Jellyfin is running on Apache and just use those instructions?