Directory structure

The directory structure for a newly created trainjs app:

.
├── app
|   ├── controllers
|   └── models
├── config
|   ├── application.js
|   ├── database.json
|   └── routes.js
├── public
|   ├── assets
|   ├── partials
|   └── index.html
├── package.json
└── README.md

An overview of what each of these does:

File / Directory	Description
`app/`	Back-End Core application code, including models, controllers, and helpers
`config/`	Application configuration
`public/`	Front-End Core application code, including services, controllers, and partials
`public/assets`	Applications assets such as cascading style sheets (CSS), JavaScript files, and images
`package.json`	Module requirements for this app
`README.md`	A brief description of the application

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