.gems

rack_hoptoad

config.ru

require 'rack_hoptoad'

use Rack::HoptoadNotifier, "123abc"

run lambda {|env|
  fail "Fail!"
}

config.ru

require 'rack_hoptoad'
require 'example'

use Rack::HoptoadNotifier, "1234"

run Sinatra::Application

example.rb

require 'sinatra'

configure :production do
  enable :raise_errors
end

get '/boom' do
  fail "Fail from Sinatra!"
end