update readme

Author: soldatov-ss

README.md

@@ -66,4 +66,6 @@ python manage.py create_referral_program --name="My Referral Program" --commissi
 This package is licensed under the MIT License. See the LICENSE file for more details.
 
 ### Contributing
-If you find any issues or have suggestions, feel free to open an issue or submit a pull request.
+If you find any issues or have suggestions, feel free to open an issue or submit a pull request.
+
+To support this project, please give star it on Github. ![github star](docs/github-star.png)