Add kubebuilder as a prerequisite to README (#31)

README.md

@@ -27,12 +27,11 @@ The project is based on [Kubebuilder](https://github.com/kubernetes-sigs/kubebui
 - make
 - kubectl
 - kustomize
+- [kubebuilder](https://github.com/kubernetes-sigs/kubebuilder) for running tests
 - [ginkgo](https://onsi.github.io/ginkgo/) for local integration testing
 - access to K8s environment: minikube or a remote K8s cluster
 - [mockery](https://github.com/vektra/mockery) to generate mocks for testing purposes
 
-
-
 ## Design
 
 Take a look at [Design Readme](./docs/README.md).
@@ -60,4 +59,4 @@ To deploy the controller, edit the value of the ```--hydra-url``` argument in th
 Use mockery to generate mock types that implement existing interfaces. To generate a mock type for an interface, navigate to the directory containing that interface and run this command:
 ```
 mockery -name={INTERFACE_NAME}
-```
+```