Reverse Proxy

[Antonio]

Hello

I have a web project in which we have some images taken from a system 
file, through rewrite and php (http://img.mydomain.com/a331ad44ef -> 
http://img.mydomain.com/index.php?image = a331ad44ef). But to have 
thousands of visits was this much loading system. In other similar 
projects have used squid as a proxy reverse, but wanted to use this as a 
proxy nginx reverse, for caching images for some time and not overload 
the system. Could do? This configuration would be correct?. Thank you 
very much.

Regards,
Antony.