switch to unicorn.

Gemfile

@@ -7,6 +7,7 @@ gem 'rails', '3.1.4'
 
 gem 'pg'
 gem 'spree'
+gem 'unicorn'
 
 
 # Gems used only for assets and not required

Gemfile.lock

@@ -84,6 +84,7 @@ GEM
       actionpack (>= 3.0.0)
       activesupport (>= 3.0.0)
       railties (>= 3.0.0)
+    kgio (2.7.4)
     mail (2.3.3)
       i18n (>= 0.4.0)
       mime-types (~> 1.16)
@@ -136,6 +137,7 @@ GEM
       rake (>= 0.8.7)
       rdoc (~> 3.4)
       thor (~> 0.14.6)
+    raindrops (0.8.0)
     rake (0.9.2.2)
     rdoc (3.12)
       json (~> 1.4)
@@ -212,6 +214,10 @@ GEM
     uglifier (1.2.3)
       execjs (>= 0.3.0)
       multi_json (>= 1.0.2)
+    unicorn (4.2.1)
+      kgio (~> 2.6)
+      rack
+      raindrops (~> 0.7)
     warden (1.0.6)
       rack (>= 1.0)
     wasabi (2.1.0)
@@ -231,3 +237,4 @@ DEPENDENCIES
   spree_usa_epay
   turn (~> 0.8.3)
   uglifier (>= 1.0.3)
+  unicorn

Procfile

@@ -0,0 +1 @@
+web: bundle exec unicorn -p $PORT -c ./config/unicorn.rb

config/unicorn.rb

@@ -0,0 +1,2 @@
+worker_processes 4 # amount of unicorn workers to spin up
+timeout 30         # restarts workers that hang for 30 seconds