Added readme.

Author: olsgreen

readme.md

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+# IP Authorization for Laravel
+
+[![Latest Stable Version](https://poser.pugx.org/boxed-code/laravel-ip-authorization/v/stable)](https://packagist.org/packages/boxed-code/laravel-ip-authorization)
+[![License](https://poser.pugx.org/boxed-code/laravel-challenge/license)](https://packagist.org/packages/boxed-code/laravel-challenge)
+[![Tests](https://github.com/boxed-code/laravel-ip-authorization/actions/workflows/run_tests.yml/badge.svg)](https://github.com/boxed-code/laravel-ip-authorization/actions/workflows/run_tests.yml)
+
+Easily control access to your app by IP address, range or subnet.
+
+### Installation
+```composer require boxed-code/laravel-ip-authorization```