generated new images_conroller.rb file and also index.html.erb within views folder
generated new controller called welcome
added index method to welcome controller
set root 'welcome#index' in the routes.rb file
deleted welcome_controller.rb file and changed routes.rb to have root 'images#index' as the new root of the app
added resources :images to routes.rb file and ran rake routes
added gem rails_12factor to Gemfile and ran bundle install
 added ruby gem to Gemfile. Commented out username in config/database.yml. Ran bundle install