add testing device images and a lot more, before bootstrap:themed

config/environments/development.rb

@@ -5,6 +5,13 @@ Qrammer::Application.configure do
   # every request. This slows down response time but is perfect for development
   # since you don't have to restart the web server when you make code changes.
   config.cache_classes = false
+  silence_warnings do
+    begin
+        require 'pry'
+        IRB = Pry
+    rescue LoadError
+    end
+  end
 
   # Log error messages when you accidentally call methods on nil.
   config.whiny_nils = true