nginx configuration for Rails page caching

nginx.conf

    server {
      listen       80;
      server_name  [domain name];
 
      root   [Rails root]/public;

      location @passenger {
        passenger_enabled on;
        passenger_app_env production;
      }

      location / {
        error_page 418 = @passenger; return 418;
      }

      location ~ ^/assets/ {
        gzip_static on;
        expires max;
        add_header Cache-Control public;
        add_header ETag "";
        add_header Last-Modified "";
      }

      location ~ ^/[path]/? {
        try_files $uri /system/$uri.html @passenger;
        gzip_static on;
        expires max;
        add_header Cache-Control public;
        add_header ETag "";
        add_header Last-Modified "";
      }
    }