Give this post by ngsankar a try. It sets it up from scratch
Thank you for the help. Those instructions didn't work for me, But I was able to figure it all out, FINALLY. NGINX and reverse proxy was a headache. kept wanting to go to mydomain.com:4567. Figured out that on OC under proxypass you have to put mydomain.com:4567 instead of 127.0.0.1:4567. Then restart nginx via service nginx restart. Did everything as root. no need to create a new user with sudo privileges..