diff --git a/README.md b/README.md
index e1460c8..d035b79 100644
--- a/README.md
+++ b/README.md
@@ -7,33 +7,41 @@ Tagged Gist
 [![Dependency Status](https://gemnasium.com/i2bskn/tagged-gist.png)](https://gemnasium.com/i2bskn/tagged-gist)
 
 
-Creating...
+Web application to tag the Gists.
 
-== README
+#### Application on Heroku
 
-This README would normally document whatever steps are necessary to get the
-application up and running.
+[https://tagged-gist.herokuapp.com](https://tagged-gist.herokuapp.com)
 
-Things you may want to cover:
+## Requirements
 
-* Ruby version
+* Ruby 2.0.0
+* PostgreSQL
 
-* System dependencies
+## Configuration
 
-* Configuration
+#### Sessions secret key
 
-* Database creation
+```
+export RAILS_SECRET_KEY=rails_secret_key_base
+```
 
-* Database initialization
+#### GitHub Application config
 
-* How to run the test suite
+```
+export GITHUB_KEY=your_app_client_id
+export GITHUB_SECRET=your_app_client_secret
+```
 
-* Services (job queues, cache servers, search engines, etc.)
+## Deproyment instructions
 
-* Deployment instructions
+#### for Heroku
 
-* ...
-
-
-Please feel free to use a different markup language if you do not plan to run
-<tt>rake doc:app</tt>.
+```
+heroku create
+heroku config:set RAILS_SECRET_KEY=rails_secret_key_base
+heroku config:set GITHUB_KEY=your_app_client_id
+heroku config:set GITHUB_SECRET=your_app_client_secret
+git push heroku master
+heroku open
+```
diff --git a/spec/controllers/sessions_controller_spec.rb b/spec/controllers/sessions_controller_spec.rb
index 702c559..6ef7e4b 100644
--- a/spec/controllers/sessions_controller_spec.rb
+++ b/spec/controllers/sessions_controller_spec.rb
@@ -1,5 +1,27 @@
 require 'spec_helper'
 
 describe SessionsController do
+  let(:user) {FactoryGirl.create(:user)}
 
+  def valid_session
+    {user: user.id}
+  end
+
+  describe "GET destroy" do
+    it "returns http redirect" do
+      get :destroy, {}, valid_session
+      expect(response).to be_redirect
+    end
+
+    it "should redirect to root_path" do
+      get :destroy, {}, valid_session
+      expect(response).to redirect_to(root_path)
+    end
+
+    it "should clear session" do
+      session[:user] = user.id
+      get :destroy, {}, valid_session
+      expect(session[:user]).to be_nil
+    end
+  end
 end