Nginx, django, gunicorn, ubuntu 14.04 (13: Permission denied) while connecting to upstream
proxy_pass http://unix:/root/myproject/myproject.sock;
The socket is in the superuser's home folder. That's pretty much inaccessible to all other users including your nginx users. Please more the socket to a different location. /var/log/gunicorn/ is a good place.
Also do i see you running gunicorn as root?. Not recommended.
setuid root
Please use some other user here.