config.ru

use Rack::Static,
  :urls => ["/fonts", "/stylesheets"],
  :root => "."

run lambda { |env|
  file = env['REQUEST_PATH']
  file = file[1..-1]
  file = "index.html" if file.size == 0
  file += '/index.html' if File.directory?(file)
  [
    200,
    {
      
      'Content-Type'  => 'text/html',
      'Cache-Control' => 'public, max-age=86400'
    },
    File.open(file, File::RDONLY)
  ]
  
  # How do I map /foo to bar.merserver.com
  # map '/foo' do
  #  do something...
  # end
}