Update README.md

Added link to CONTRIUBTING.md

Author: devondragon

README.md

@@ -336,6 +336,11 @@ The framework supports SSO OAuth2 with Google, Facebook and Keycloak.  To enable
 
 For complete working examples, check out the [Spring User Framework Demo Application](https://github.com/devondragon/SpringUserFrameworkDemoApp).
 
+## Contributing
+
+We welcome contributions of all kinds! If you'd like to help improve SpringUserFramework, please read our [Contributing Guide](CONTRIBUTING.md) for details on how to get started, report issues, and submit pull requests. Let's build something great together!
+
+
 ## Reference Documentation
 
 - [API Documentation](https://digitalSanctuary.github.io/SpringUserFramework/)