Use unicorn

Gemfile

@@ -1,7 +1,11 @@
 source :rubygems
 
+ruby '1.9.3' rescue nil
+
 gem 'rake', '~> 10.0'
 
+gem 'unicorn'
+
 gem 'sinatra', '~> 1.3'
 gem 'mustache', '~> 0.99', require: 'mustache/sinatra'
 
@@ -15,3 +19,8 @@ group :test do
   gem 'rspec', '~> 2.12'
   gem 'rack-test', '~> 0.6', require: 'rack/test'
 end
+
+group :development do
+  gem 'foreman'
+  gem 'rerun'
+end

Gemfile.lock

@@ -6,15 +6,22 @@ GEM
       multipart-post (~> 1.1)
     faraday_middleware (0.9.0)
       faraday (>= 0.7.4, < 0.9)
+    foreman (0.60.2)
+      thor (>= 0.13.6)
     json (1.7.5)
+    kgio (2.7.4)
+    listen (0.5.3)
     multipart-post (1.1.5)
     mustache (0.99.4)
     rack (1.4.1)
     rack-protection (1.2.0)
       rack
     rack-test (0.6.2)
       rack (>= 1.0)
+    raindrops (0.10.0)
     rake (10.0.2)
+    rerun (0.7.1)
+      listen
     rspec (2.12.0)
       rspec-core (~> 2.12.0)
       rspec-expectations (~> 2.12.0)
@@ -28,18 +35,26 @@ GEM
       rack (~> 1.3, >= 1.3.6)
       rack-protection (~> 1.2)
       tilt (~> 1.3, >= 1.3.3)
+    thor (0.14.6)
     tilt (1.3.3)
+    unicorn (4.4.0)
+      kgio (~> 2.6)
+      rack
+      raindrops (~> 0.7)
 
 PLATFORMS
   ruby
 
 DEPENDENCIES
   faraday (~> 0.8.4)
   faraday_middleware (~> 0.9.0)
+  foreman
   json (~> 1.7)
   mustache (~> 0.99)
   rack-test (~> 0.6)
   rake (~> 10.0)
+  rerun
   rspec (~> 2.12)
   sass (~> 3.2)
   sinatra (~> 1.3)
+  unicorn

Procfile

@@ -0,0 +1 @@
+web: bundle exec ./script/server

script/server

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+cd "$(dirname "$0")/.."
+[ $PORT ]     || PORT=3000
+[ $RACK_ENV ] || RACK_ENV=development
+
+cmd="ruby -Ilib -S bundle exec ruby -I lib -S unicorn config.ru -p $PORT -E $RACK_ENV"
+[[ $RACK_ENV == "development" ]] && exec rerun "$cmd -l 127.0.0.1:$PORT"
+exec $cmd