This is the source for the Home Assistant website available at Home-Assistant.io.

You need to have Ruby installed.

git clone --recursive https://github.com/balloob/home-assistant.io.git
cd home-assistant.io
bundle
rake preview

On CentOS (here 7.1.1503) Ruby is not available by default. Please take the notes here as a little guide for the Ruby installation process.

curl -sSL https://rvm.io/mpapis.asc | gpg2 --import -
curl -L get.rvm.io | bash -s stable
source ~/.profile
rvm requirements
rvm install ruby-2.2.2
rvm use ruby-2.2.2 --default
ruby -v

The last command will give you something like this ruby 2.2.2p95 (2015-04-13 revision 50295) [x86_64-linux]. Then install bundler.

gem install bundler

Now please follow the instruction above.