Add a link to the docs

Author: dunglas

README.md

@@ -2,8 +2,8 @@
 
 This is a Flex pack to install API Platform, a next-generation web framework designed to easily create API-first projects without compromising extensibility and flexibility.
 
-See the [API Platform](https://github.com/api-platform/api-platform) github page.
+Installation instructions are available in the [API Platform documentation](https://api-platform.com/docs/distribution#using-symfony-flex-and-composer-advanced-users).
 
 ## License
 
-The MIT License (MIT). Please see [License File](LICENSE) for more information.
+The MIT License (MIT). Please see [License File](LICENSE) for more information.