update document.

README.rst

@@ -6,6 +6,10 @@ Welcome to Heso
 ===============
 Heso is web application to share snippets and pastes with others, and an open source clone of Gist.
 
+Live Demo
+=========
+You can see Heso running at http://heso.nirvake.org/.
+
 Getting started
 ===============
 Heso requires git. Install it anyway::
@@ -30,7 +34,37 @@ Now, you can run the server::
 
     bin/server
 
+Installing on Heroku
+====================
+Install git and heroku gem anyway::
+
+    sudo yum install git -y
+    sudo yum install rubygems -y && sudo gem install heroku
+
+Log in to Heroku. If you're not yet setting up your SSH keys, you have to do it::
+
+    heroku login
+
+Download the source code and change directory::
+
+    git clone git://github.com/lanius/heso.git
+    cd heso/src/heso
+
+Edit setting.py and change value of "RUN_ON_HEROKU" to "True"::
+
+    vi setting.py
+
+Track files (heso/src/heso/\*) with git::
+
+    git init
+    git add .
+    git commit -m "initial commit for Heso on Heroku"
+
+Create a new Cedar app on Heroku and push Heso::
+
+    heroku create --stack cedar
+    git push heroku master
+
 License
 =======
 Heso is licensed under the Apache Licence, Version 2.0 (http://www.apache.org/licenses/LICENSE-2.0.html).
-