add readme

Author: mpociot

README.md

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+# Laravel WebSockets Demo 🛰
+
+This is a demo application built with the [Laravel WebSockets](https://github.com/beyondcode/laravel-websockets) package.
+
+Be sure to check out the [official documentation](https://docs.beyondco.de/laravel-websockets/).
+
+
+## Credits
+
+- [Marcel Pociot](https://github.com/mpociot)
+- [Freek Van der Herten](https://github.com/freekmurze)
+- [All Contributors](../../contributors)
+
+## License
+
+The MIT License (MIT). Please see [License File](LICENSE.md) for more information.