add contributing and license section to readme

Author: cenkayla

README.md

@@ -50,4 +50,13 @@ Check out on [go-dcp](https://github.com/Trendyol/go-dcp#configuration)
 | cbgo_mongodb_connector_action_total_current                      | Count mongodb actions         | `action_type`: Type of action (e.g., `delete`) `result`: Result of the action (e.g., `success`, `error`)  `database_name`: The name of the database to which the action is applied | Counter    |
 
 You can also use all DCP-related metrics explained [here](https://github.com/Trendyol/go-dcp#exposed-metrics).
-All DCP-related metrics are automatically injected. It means you don't need to do anything.
+All DCP-related metrics are automatically injected. It means you don't need to do anything.
+
+## Contributing
+
+Go Dcp MongoDB is always open for direct contributions. For more information please check
+our [Contribution Guideline document](./CONTRIBUTING.md).
+
+## License
+
+Released under the [MIT License](LICENSE).