diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..d12f885
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,4 @@
+source 'http://rubygems.org'
+
+gem 'sinatra'
+gem 'github-markup'
diff --git a/Gemfile.lock b/Gemfile.lock
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index 0000000..94e5619
--- /dev/null
+++ b/Gemfile.lock
@@ -0,0 +1,16 @@
+GEM
+  remote: http://rubygems.org/
+  specs:
+    github-markup (0.5.3)
+    rack (1.3.2)
+    sinatra (1.2.6)
+      rack (~> 1.1)
+      tilt (>= 1.2.2, < 2.0)
+    tilt (1.3.2)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  github-markup
+  sinatra
diff --git a/app.rb b/app.rb
new file mode 100644
index 0000000..7ffdfee
--- /dev/null
+++ b/app.rb
@@ -0,0 +1,7 @@
+require 'sinatra/base'
+
+class Preview < Sinatra::Base
+  get '/' do
+    'hi'
+  end
+end
diff --git a/config.ru b/config.ru
new file mode 100644
index 0000000..cdd3c92
--- /dev/null
+++ b/config.ru
@@ -0,0 +1,3 @@
+dir = File.expand_path(File.dirname(__FILE__))
+require dir+'/app'
+run Preview