I am using nginx in reverse proxy mode. In my server section I have this code to set expire and cache control of my static files.

     location ~* ^.+\.(css|js|png|gif)$ {
         access_log off;
         expires max;
         add_header Cache-Control public;
         if (!-f $request_filename) {
           proxy_pass  http://localhost:82;
         }

     }

This is quite obviously creating issues. Can someone help me correct this code to use try_files or rewrite?