For setting up the local environment, we need to install a few things. Lets start with node.
sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties libffi-dev nodejs
Change the path to directory where you cloned the repo and do an npm install
npm install
npm start
Go to the task manager(Windows) or activity monitor based on your OS and kill al instances of Chrome.
You will need to run Chome in disabed security mode using
google-chrome --disable-web-security --user-data-dir
npm start
Open localhost:3000 in Chrome