Reverse Proxy Using Nginx to Serve Static Files Faster

Reverse Proxy
A proxy in common usage, is a stand-in for a web-browser. When a web browser requests access to a web resource, the web resource needs some idea of where it should send the answer. In reverse, the proxy stands-in for the web server. In such a case, the true location of the web server (whose content is being served) is hidden, from the standpoint of the client making the request.

The common solutions found on web is to point all traffic to NGINX and route traffic to APACHE if it's not static files, but with our case, we don't want to change the current configuration of existing APACHE installation and settings as much as possible. The safe technique will be used to serve static contents like images from another server using a much lighter web server application name NGINX. The rest of the page would remain served via APACHE.

I've done this prototype in 64 Bit Red Hat Linux, some command may vary in other Linux distro.