update README.md

Author: imahmood

README.md

@@ -1,4 +1,5 @@
 # Laravel FileStorage package
+
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@@ -7,5 +8,28 @@
 FileStorage is a Laravel package that simplifies the process of uploading and attaching files to models,
 while also automating preview generation and image optimization.
 
+## Features
+
+- Easily upload and attach files to models.
+- Specify the storage disk dynamically using the `onDisk` method.
+- Automatically generate previews for images and PDFs and optimize images, improving user experience.
+
+## Requirements
+
+Before using this package, make sure your environment meets the following requirements:
+
+- **PHP:** 8.1 or later.
+- **Extensions:** `ext-ffi` extension is required.
+- **System Packages:** `libvips42` library is necessary for image processing.
+
+
+## Documentation
+
+* [Installation](docs/installation.md)
+* [Quick start](docs/quick-start.md)
+* [Getting a file URL](docs/getting-url.md)
+* [Methods](docs/methods.md)
+* [Events](docs/events.md)
+
 ## License
 The MIT License (MIT). Please see [License File](LICENSE) for more information.