Updating driver installation documentation
## Install Driver
-1. [One-time per project] Create GCP service account for the CSI driver and set required roles
+1. Clone the driver to your local machine
+```
+$ git clone https://github.com/kubernetes-sigs/gcp-compute-persistent-disk-csi-driver $GOPATH/src/sigs.k8s.io/gcp-compute-persistent-disk-csi-driver
+```
+
+2. [One-time per project] Create GCP service account for the CSI driver and set required roles
```
$ PROJECT=your-project-here # GCP project
$ GCE_PD_SA_NAME=my-gce-pd-csi-sa # Name of the service account to create
@@ -10,7 +15,7 @@ $ GCE_PD_SA_DIR=/my/safe/credentials/directory # Directory to save the servic
$ ./deploy/setup-project.sh
```
-2. Deploy driver to Kubernetes Cluster
+3. Deploy driver to Kubernetes Cluster
```
$ GCE_PD_SA_DIR=/my/safe/credentials/directory # Directory to get the service account key
$ GCE_PD_DRIVER_VERSION=stable # Driver version to deploy
