Injected Google Analytics tracker ID configuration into development configuration

config/environments/development.rb

@@ -26,4 +26,9 @@ PrelangTest::Application.configure do
   # This option may cause significant delays in view rendering with a large
   # number of complex assets.
   config.assets.debug = true
+
+  # [Prelang] Added environment variable
+  GA.tracker = ""
+
 end
+