use unicorn via procfile

.gitignore

@@ -6,6 +6,7 @@
 
 # Ignore bundler config
 /.bundle
+.env
 
 # Ignore the default SQLite database.
 /db/*.sqlite3

Gemfile

@@ -1,6 +1,8 @@
 source 'https://rubygems.org'
 ruby '1.9.3'
 
+gem 'unicorn'                 # robust production server
+
 gem 'rails', '3.2.14'         # Bundle edge? gem 'rails', :git => 'git://github.com/rails/rails.git'
 gem 'bcrypt-ruby', '~> 3.0.0' # To use ActiveModel 'has_secure_password'
 gem 'friendly_id'             # To get nice Urls
@@ -17,6 +19,7 @@ end
 
 group :development, :test do
   gem 'sqlite3'
+  gem 'foreman'      # start all associated processes via 'Procfile'
   gem 'ruby-debug19'
 #TODO try following gems
 #  gem 'railroady'   # creates an UML diagramm

Gemfile.lock

@@ -55,6 +55,7 @@ GEM
     columnize (0.3.6)
     database_cleaner (1.1.1)
     diff-lcs (1.2.4)
+    dotenv (0.9.0)
     erubis (2.7.0)
     execjs (2.0.1)
     factory_girl (4.2.0)
@@ -63,6 +64,9 @@ GEM
       factory_girl (~> 4.2.0)
       railties (>= 3.0.0)
     ffi (1.9.0)
+    foreman (0.63.0)
+      dotenv (>= 0.7)
+      thor (>= 0.13.6)
     formatador (0.2.4)
     friendly_id (4.0.10.1)
       activerecord (>= 3.0, < 4.0)
@@ -88,6 +92,7 @@ GEM
       railties (>= 3.0, < 5.0)
       thor (>= 0.14, < 2.0)
     json (1.8.0)
+    kgio (2.9.1)
     launchy (2.3.0)
       addressable (~> 2.3)
     linecache19 (0.5.12)
@@ -145,6 +150,7 @@ GEM
       rake (>= 0.8.7)
       rdoc (~> 3.4)
       thor (>= 0.14.6, < 2.0)
+    raindrops (0.12.0)
     rake (10.1.0)
     rb-fsevent (0.9.3)
     rb-inotify (0.9.1)
@@ -204,6 +210,10 @@ GEM
     uglifier (2.2.1)
       execjs (>= 0.3.0)
       multi_json (~> 1.0, >= 1.0.2)
+    unicorn (4.8.2)
+      kgio (~> 2.6)
+      rack
+      raindrops (~> 0.7)
     will_paginate (3.0.4)
     will_paginate-bootstrap (1.0.0)
       will_paginate (>= 3.0.3)
@@ -220,6 +230,7 @@ DEPENDENCIES
   coffee-rails (~> 3.2.1)
   database_cleaner
   factory_girl_rails
+  foreman
   friendly_id
   guard-rspec
   guard-spork
@@ -238,5 +249,6 @@ DEPENDENCIES
   spork-rails
   sqlite3
   uglifier (>= 1.0.3)
+  unicorn
   will_paginate
   will_paginate-bootstrap (~> 1.0.0)

Procfile

@@ -0,0 +1 @@
+web: bundle exec unicorn -p $PORT -E $RACK_ENV