Remote access problems using Nginx and Cloudflare.

[Cadmoon]

Hi guys, I'm having some issues getting remote access up and running on my server. 
Whenever I try to connect to my domain that is reverse proxied to my server via Cloudflare I get a 502 (bad gateway) error. Everything indicates a server side error but I can't figure out where. 

Some info on my current setupand what I have done so far: 
Running Jellyfin and Nginx as dockers on Unraid
I have contacted my ISP and had them remove me from CGNAT and unblock ports from their end
I have opened ports 80 and 443 on my router and forwarded them to Nginx's internal IP 
I set up DNS records in Cloudflare to direct my domain to my IP and have set the provided nameservers with my domain registrar 
I have set up the redirects for my domain to my internal jellyfin IP and port in Nginx, using http, and attached an SSL cert generated with Nginx 

Anything standing out that I missed or may have configured wrong? As a trial I set Nginx to direct my domain to a 404 host and this seemed to work, at least in that I got shown a generic 404. 

If anyone needs any other info to help out please let me know. 

Thanks