How to clone existing ember.js projects from Github repository and run into you local machine?

After installing Git, Node.js, Bower, Ember Cli and Phantoms Js into my local machine. I do the following steps.

1. Git clone sample // in this case sample is a new repository in my local machine
2. cd sample
3. npm install
4. bower install

So, after that, when i enter this command: ember server

It says that I am missing some dependencies. Do you know how to generally clone any public ember.js projects from Github account and run into your machine?