make it better

Gemfile

@@ -5,10 +5,6 @@ gem 'bootstrap-sass',       '3.2.0.0'
 gem 'will_paginate-bootstrap'
 gem 'bootstrap-will_paginate', '0.0.10'
 gem 'faker', '1.4.2'
-gem 'carrierwave',             '0.10.0'
-gem 'mini_magick',             '3.8.0'
-gem 'fog',                     '1.23.0'
-gem 'puma', '2.11.1'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '4.2.3'
@@ -60,6 +56,5 @@ group :test do
 end
 
 group :production do
-  gem 'pg',  '0.17.1'
   gem 'rails_12factor', '0.0.2'
 end
\ No newline at end of file

Gemfile.lock

@@ -153,6 +153,11 @@ GEM
       rails-deprecated_sanitizer (>= 1.0.1)
     rails-html-sanitizer (1.0.2)
       loofah (~> 2.0)
+    rails_12factor (0.0.2)
+      rails_serve_static_assets
+      rails_stdout_logging
+    rails_serve_static_assets (0.0.4)
+    rails_stdout_logging (0.0.3)
     railties (4.2.3)
       actionpack (= 4.2.3)
       activesupport (= 4.2.3)
@@ -227,6 +232,7 @@ DEPENDENCIES
   minitest-reporters (= 1.0.5)
   mysql2
   rails (= 4.2.3)
+  rails_12factor (= 0.0.2)
   sass-rails (~> 5.0)
   sdoc (~> 0.4.0)
   spring