Below is a quick short-hand note to remind oneself to setup proxying properly between Tomcat and NGINX.

Edit this file: /etc/apache2/sites-enabled/portal.dragoncoin.conf

Add this content:

server {
    server_name  portal.dragoncoin.com;

    location / {
        proxy_set_header X-Forwarded-Host $host;
        proxy_set_header X-Forwarded-Server $host;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_pass http://localhost:80; # where 80 is the port of the tomcat app
    }
}

Edit this file: /etc/nginx/nginx.conf

Find this:

http { ... }

Add this content:

include /etc/apache2/sites-enabled/portal.dragoncoin.conf