Expand docs index page

Author: DuckThom

docs/index.md

@@ -6,3 +6,46 @@
 [![StyleCI](https://styleci.io/repos/82349568/shield?branch=master)](https://styleci.io/repos/82349568)
 [![TravisCI](https://travis-ci.org/DuckThom/laravel-importer.svg?branch=master)](https://travis-ci.org/DuckThom/laravel-importer)
 [![License](https://poser.pugx.org/luna/laravel-importer/license)](https://packagist.org/packages/luna/laravel-importer)
+
+## Prerequisites
+
+- PHP 7.0 or 7.1
+- Laravel 5.4
+
+## Installation
+
+To install this package, run:
+```
+composer require luna/laravel-importer 
+```
+
+## Setup
+
+Add the service provider and facade to `config/app.php`:
+```php
+    'providers' => [
+        // ...
+        // Package providers
+        
+        Luna\Importer\ServiceProvider::class,
+    ],
+     
+    'aliases' => [
+        // ...
+        
+        "Import" => Luna\Importer\ImporterFacade::class
+    ]
+```
+
+Publish the configuration:
+```
+    php artisan vendor:publish --provider="Luna\Importer\ServiceProvider"
+```
+
+## Contributing
+
+1. Fork `https://github.com/DuckThom/laravel-importer`
+2. Run `composer install`
+3. Make changes
+4. Add tests if possible
+5. Push and create a PR