docs: Add mandatory sections to README.md (#360)

README.md

@@ -28,3 +28,15 @@ The [Listener package](https://github.com/kyma-project/runtime-watcher/tree/main
 
 The release process is described in the [How To Release](./docs/how_to_release.md) document.
 For further details on Runtime Watcher's architecture, see the [Architecture](./docs/architecture.md) document.
+
+## Contributing
+
+See the [Contributing Rules](CONTRIBUTING.md).
+
+## Code of Conduct
+
+See the [Code of Conduct](CODE_OF_CONDUCT.md) document.
+
+## Licensing
+
+See the [license](./LICENSE) file.