Use pg in production for heroku

Author: steveklabnik

Diff for: Gemfile

@@ -5,8 +5,8 @@ gem 'rails', '4.0.1'
 
 gem 'rails-api'
 
-# Use sqlite3 as the database for Active Record
-gem 'sqlite3'
+gem 'pg', group: :production
+gem 'sqlite3', group: :development
 
 
 # To use ActiveModel has_secure_password

Diff for: Gemfile.lock

@@ -37,6 +37,7 @@ GEM
     mime-types (1.25.1)
     minitest (4.7.5)
     multi_json (1.8.2)
+    pg (0.17.0)
     polyglot (0.3.3)
     rack (1.5.2)
     rack-test (0.6.2)
@@ -82,6 +83,7 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  pg
   rails (= 4.0.1)
   rails-api
   sqlite3