/assets/icons/*
  Cache-Control max-age=3600, public, must-revalidate

/assets/images/*
  Cache-Control max-age=3600, public, must-revalidate

/assets/stylesheets/*
  Cache-Control: max-age=31536000, public, immutable

/assets/javascripts/*
  Cache-Control: max-age=31536000, public, immutable

/assets/javascripts/lunr/*
  ! Cache-Control
