image proxy

gistfile1.txt

 # web cluster nodes
    # in this setup we have three local application servers
    upstream web-cluster {
        server a4.mzstatic.com;
        #server 10.0.0.12;
        #server 10.0.0.13;
    }

    # force redirect of http to https
    # application will be available only over https
    server {
        listen 80 default;
        server_name foobar;

       location / {
            proxy_pass http://web-cluster;
            proxy_set_header Host "a4.mzstatic.com";
            expires max;
     }
   }