First time This application is the same as Amazingpoll.com. It's written is nodejs, mongodb, socketio.
If you want to run this application, Please install MongoDB on your computer and create a database name 'poll'. Then just use the terminal navigate to the directory of the project and run "node index.js"
this is a video about installing MongoDB "https://www.youtube.com/watch?v=1uFY60CESlM", I hope it will help, thanks