gzip on;
gzip_types
  text/plain
  text/css
  text/xml
  text/json
  image/svg+xml
  application/xml
  application/json
  application/xhtml+xml
  application/rss+xml
  application/atom_xml
  application/x-javascript
  application/javascript;
gzip_vary on;
gzip_disable "msie6";
expires $custom_expires;
add_header Cache-Control $custom_cache_control;