Rack config for static sites

config.ru

#use this as config.ru to deploy static sites on Heroku
use(Rack::Static, :urls => ["/js", "/css", "/images", "/etc"])
 
run lambda { |env|
  [
   200,
   {
     'Content-Type'  => 'text/html',
     'Cache-Control' => 'public, max-age=86400'
   },
   File.open('index.html', File::RDONLY)
  ]
}