Francis Day,

Wow ... that did it! You resolved my issue! After troubleshooting for 1 full week of troubleshooting, it's resolved! Thank you so much!

So I edited my /etc/nginx/sites-available/discourse.conf file:

* I changed THIS line:
proxy_pass http://discourse.domainame.com:8080/;

To THIS line:
proxy_pass http://192.168.0.104:8080/;

So basically calling the Local IP Address instead of the Hostname as you suggested.

Anyways, after I reloaded and restarted Nginx, and my Discourse Forum site came right up!