Setup for heroku

Gemfile

@@ -1,7 +1,6 @@
 source 'https://rubygems.org'
 
 gem 'rails', '4.2.4'
-gem 'sqlite3'
 gem 'sass-rails', '~> 5.0'
 gem 'uglifier', '>= 1.3.0'
 gem 'coffee-rails', '~> 4.1.0'
@@ -16,9 +15,16 @@ gem 'simple_form'
 
 gem 'omniauth-reddit', :git => 'git://github.com/jackdempsey/omniauth-reddit.git'
 
+group :production do
+  gem 'rails_12factor'
+  gem 'pg'
+  gem 'puma'
+end
+
 group :development, :test do
   gem 'dotenv-rails'
   gem 'byebug'
+  gem 'sqlite3'
 end
 
 group :development do

Gemfile.lock

@@ -113,6 +113,8 @@ GEM
     omniauth-oauth2 (1.3.1)
       oauth2 (~> 1.0)
       omniauth (~> 1.2)
+    pg (0.18.3)
+    puma (2.14.0)
     quiet_assets (1.1.0)
       railties (>= 3.1, < 5.0)
     rack (1.6.4)
@@ -142,6 +144,11 @@ GEM
       ruby-graphviz (~> 1.2)
     rails-html-sanitizer (1.0.2)
       loofah (~> 2.0)
+    rails_12factor (0.0.3)
+      rails_serve_static_assets
+      rails_stdout_logging
+    rails_serve_static_assets (0.0.4)
+    rails_stdout_logging (0.0.4)
     railties (4.2.4)
       actionpack (= 4.2.4)
       activesupport (= 4.2.4)
@@ -207,9 +214,12 @@ DEPENDENCIES
   jbuilder (~> 2.0)
   jquery-rails
   omniauth-reddit!
+  pg
+  puma
   quiet_assets
   rails (= 4.2.4)
   rails-erd
+  rails_12factor
   sass-rails (~> 5.0)
   sdoc (~> 0.4.0)
   simple_form

config/database.yml

@@ -21,5 +21,6 @@ test:
   database: db/test.sqlite3
 
 production:
-  <<: *default
-  database: db/production.sqlite3
+  adapter: postgresql
+  encoding: unicode
+  pool: 5

config/puma.rb

@@ -0,0 +1,15 @@
+workers Integer(ENV['WEB_CONCURRENCY'] || 2)
+threads_count = Integer(ENV['MAX_THREADS'] || 5)
+threads threads_count, threads_count
+
+preload_app!
+
+rackup      DefaultRackup
+port        ENV['PORT']     || 3000
+environment ENV['RACK_ENV'] || 'development'
+
+on_worker_boot do
+  # Worker specific setup for Rails 4.1+
+  # See: https://devcenter.heroku.com/articles/deploying-rails-applications-with-the-puma-web-server#on-worker-boot
+  ActiveRecord::Base.establish_connection
+end