Install nodejs
In Debian, you should install a nodejs fresh enough, commands recommended below
curl -sL https://deb.nodesource.com/setup_6.x | sudo -E bash -
sudo apt-get install -y nodejs
Clone this repo then npm i
To run this server in backgrond, here recommend a tool-forever
sudo npm install -g forever --registry=http://registry.cnpmjs.org
forever start [your js]