fix contribution steps

Author: camilamacedo86

CONTRIBUTING.md

@@ -6,6 +6,14 @@ Kubernetes projects require that you sign a Contributor License Agreement (CLA)
 
 Please see https://git.k8s.io/community/CLA.md for more info.
 
+## Prerequisites
+- [go](https://golang.org/dl/) version v1.12+.
+- [dep](https://github.com/golang/dep) dep v0.5.1+ < v.0.5.4
+- [docker](https://docs.docker.com/install/) version 17.03+.
+- [kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl/) version v1.11.3+.
+- [kustomize](https://sigs.k8s.io/kustomize/docs/INSTALL.md) v3.1.0+
+- Access to a Kubernetes v1.11.3+ cluster.
+
 ## Contributing steps
 1. Submit an issue describing your proposed change to the repo in question.
 1. The [repo owners](OWNERS) will respond to your issue promptly.
@@ -15,9 +23,17 @@ Please see https://git.k8s.io/community/CLA.md for more info.
 
 ## How to build kubebuilder locally
 
+1. Run the following command to clone your fork of the project locally in the dir /src/sigs.k8s.io/kubebuilder
+
+```
+$ git clone git@github.com:<user>/kubebuilder.git $GOPATH/src/sigs.k8s.io/kubebuilder
+```
+
 1. Ensure you activate module support before continue (`$ export GO111MODULE=on`)
-1. Build the project by using the command `make build`
-1. Run the tests by using the command `make test` and `make test-project-generation`
+1. Build the project by using the command `make build` 
+1. Run the tests by using the command `make test`
+1. Run the command `make install` to create a bin with the source code 
+1. Run the script `./generated_golden.sh` to update/generate the mock data used in the e2e test in `$GOPATH/src/sigs.k8s.io/kubebuilder/testdata/`
 
 ## Community, discussion and support