static files and 404

[Marcelo Barbudas]

Hi,

I have a setup where I am using nginx with RubyOnRails.

The setup looks simple:
if (!-f $request_filename) {
  proxy_pass http://domain1;
  break;
}

However I have a directory that holds images that sometimes get deleted.
People keep linking to those images and the 404s go to the rails process.

How can I tell nginx that any request towards:
/images/subassets/*.gif
should never be forwarded to rails?

-- 
Cheers,
M.