Update GCP Setup instructions

Instructions are missing some steps that are necessary
to setup the cluster

Author: eschwartz

docs/gcp-gke.md

@@ -44,7 +44,7 @@ Here's an example command to create a cluster. See the [gcloud docs](https://clo
 
 You might need to iterate on the command above, so to delete the cluster:
   ```
-  gcloud container clusters delete my-cluster --zone=us-central1-a
+  gcloud container clusters delete sandbox --zone=us-central1-a
   ```
 
 # Enable CSI Driver
@@ -55,6 +55,32 @@ CSI Driver is required for persistent volumes to be mounted to pods. You can ena
 gcloud container clusters update sandbox --update-addons=GcePersistentDiskCsiDriver=ENABLED --zone=us-central1-a
 ```
 
+# Connect to Your Cluster
+
+See [GKE docs for installing and authenticating with kubectl](https://cloud.google.com/kubernetes-engine/docs/how-to/cluster-access-for-kubectl#install_plugin)
+
+See [docs for installing Helm](https://helm.sh/docs/intro/install/)
+
+Configure kubectl to connect to your GKE cluster:
+
+```
+gcloud container clusters get-credentials sandbox \
+    --region=us-central1-a
+```
+
+To test the connection, run:
+
+```
+kubectl get nodes
+```
+
+You should see something like:
+
+```
+NAME                                        STATUS   ROLES    AGE   VERSION
+gke-eoapi-test-default-pool-94a2b7e7-vg4f   Ready    <none>   5m   v1.31.5-gke.1233000
+```
+
 # Install NGINX Ingress Controller
 
 NGINX Ingress Controller can be installed through `helm` using the following command:
@@ -68,13 +94,17 @@ See the [NGINX Ingress Controller docs](https://kubernetes.github.io/ingress-ngi
 
 # Install Cert Manager
 
-Cert Manager can be installed through `helm` using the following command:
+Cert Manager can be installed through `helm` using the following commands:
 ```
+helm repo add jetstack https://charts.jetstack.io
+
+helm repo update
+
 helm upgrade --install cert-manager jetstack/cert-manager \
   --namespace cert-manager \
   --create-namespace \
   --version v1.12.0 \
   --set installCRDs=true
 ```
 
-Now we are ready to install eoapi. See the [eoapi installation instructions](../README.md/#helm-installation) for more details.
+Now we are ready to install eoapi. See the [eoapi installation instructions](../README.md/#helm-installation) for more details.