##dir: app: contain all the frontend code, in the preview we use apache as the frontend server common: contain tools functions and bussiness logic dao: dao layer, use mongoose as ORM model: entity classes routes: webapi layer test: unit tests
##preview: http://ec2-52-36-23-134.us-west-2.compute.amazonaws.com/#/home
##environment require: nodejs
##usage: npm install npm start