This looks like it will do the job

gistfile1.rb

require File.dirname(__FILE__) + '/config/boot'

require './blaze_control_panel'

application = Rack::Builder do
  use Rack::SslEnforcer if ENV['RACK_ENV'] == 'production'
  use Rack::CommonLogger, File.new('log/access.log', 'a+')
  use GoogleOpenIdAuth 
  run Rack::Cascade.new [::API::V1::Blaze, BlazeControlPanel]
end

# Responds to the AWS load balancer's ping.
class Pong
  def self.call(env)
    [200, {"Content-Type" => "text/html"}, "Pong!"]
  end
end

run Rack::URLMap.new({
  '/ping' => Pong,
  '/' => application
})