Nginx YSlow performance boost w/ Gzip + Far future expires Header

gistfile1.txt

server {
  # output compression saves bandwidth 
  gzip  on;
  gzip_http_version 1.1;
  gzip_vary on;
  gzip_comp_level 6;
  gzip_proxied any;
  gzip_types text/plain text/html text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;

  # make sure gzip does not lose large gzipped js or css files
  # see http://blog.leetsoft.com/2007/7/25/nginx-gzip-ssl
  gzip_buffers 16 8k;

  # Disable gzip for certain browsers.
  gzip_disable “MSIE [1-6].(?!.*SV1)”;

  location ~* ^.+\.(jpg|jpeg|gif|png|ico|css|zip|tgz|gz|rar|bz2|pdf|txt|tar|wav|bmp|rtf|js|flv|swf|html|htm)$ {
    expires 30d;
    access_log off;
  }

  # location ~* \.(ico|css|js|gif|jp?g|png) {
  #   if ($args ~ [0-9]+) {
  #     expires max;
  #     break;
  #   }
  # }
}

pls how i can add the script gistfile1.txt
in nginx