Add explanation for database migration resets

Co-Authored-By: theminer3746 <theminer@theminerdev.com>

README.md

@@ -16,6 +16,7 @@ This package adds functionalities to the Eloquent model and Query builder for Mo
     - [Lumen](#lumen)
     - [Non-Laravel projects](#non-laravel-projects)
   - [Testing](#testing)
+  - [Database Testing](#database-testing)
   - [Configuration](#configuration)
   - [Eloquent](#eloquent)
     - [Extending the base model](#extending-the-base-model)
@@ -113,6 +114,21 @@ To run the test for this package, run:
 docker-compose up
 ```
 
+Database Testing
+-------
+
+Resetting The Database After Each Test
+
+```php
+use Illuminate\Foundation\Testing\DatabaseMigrations;
+```
+
+And inside each test classes.
+
+```php
+use DatabaseMigrations;
+```
+
 Configuration
 -------------
 You can use MongoDB either as the main database, either as a side database. To do so, add a new `mongodb` connection to `config/database.php`: