Rack::Builder.new do
  use Rack::CommonLogger
  run SomeSinatraApp.new
end


## is this the same as:

logger_app = Rack::CommonLogger.new(SomeSinatraApp.new,{})

# inside logger_app

def call(env)
  # whatever logger_app does
  sinatra_app_here.call(env)
  # maybe more stuff logger_app might do
  return [status,opt,body]
end