NGINX Unprivileged Docker Image

This Dockerfile creates an NGINX Docker image that runs NGINX as a non root, unprivileged user. Notable differences with respect to the official NGINX Docker image include:

• The default NGINX listen port is now 8080 instead of 80
• The default NGINX user directive in /etc/nginx/nginx.conf has been removed
• The default NGINX PID has been moved from /var/run/nginx.pid to /var/cache/nginx/nginx.pid
• Change *_temp_path variables to /var/cache/nginx/*