middleman/middleman-heroku — pull request #2 by antlypls (2014-01-13 04:52:09+00:00)
Title: Add Cache-Control header

The rack application didn't set any of cache lifetime headers (`Cache-Control` or `Expires`).
`Rack::File` middleware only provides `Last-Modified` header for cache validation.
But usually it's a good idea to specify both resource lifetime and validation method, especially for static content.
What do you guys think?