config.ru in shopify-sinatra-app-0.1.4

- old
+ new

@@ -1,4 +1,9 @@
+if Gem::Specification.find_all_by_name('dotenv').any?
+  require 'dotenv'
+  Dotenv.load
+end
+
 require './lib/app'
 SinatraApp.run!