minor fixes to readme

Signed-off-by: Arvind Thirumurugan <arvindth@microsoft.com>

Author: Arvind Thirumurugan

approval-controller-metric-collector/README.md

@@ -57,54 +57,54 @@ This deploys:
 
 ### 3. Deploy Sample Metric Application
 
-Deploy a sample application that exposes health metrics:
+The sample metric application image will be automatically built and loaded to all member clusters when you run the `install-on-member.sh` script in Step 5 below. This ensures the `metric-app:local` image is available on each cluster before propagating the deployment from hub to member clusters.
+
+After the metric collector is installed (Step 5), deploy the sample application that exposes health metrics:
 
 ```bash
 kubectl apply -f ./approval-request-controller/examples/sample-metric-app/sample-metric-app.yaml
 ```
 
-This creates a deployment in the `test-ns` namespace with Prometheus annotations for metric scraping.
+This creates a deployment in the `test-ns` namespace with Prometheus annotations for metric scraping. When this deployment is propagated to member clusters via ClusterResourcePlacement, the image will already be available locally.
 
 ### 4. Install Approval Request Controller (Hub Cluster)
 
-On the hub cluster, install the approval request controller:
+On the hub cluster, install the approval request controller using the provided installation script:
 
 ```bash
 cd approval-request-controller
 
-# Build the controller image
-make docker-build IMAGE_NAME=approval-request-controller IMAGE_TAG=latest
-
-# Load into kind (if using kind)
-kind load docker-image approval-request-controller:latest --name hub
-
-# Install via Helm
-helm install approval-request-controller ./charts/approval-request-controller \
-  --namespace fleet-system \
-  --create-namespace
+# Run the installation script
+./install-on-hub.sh
 ```
 
+The script performs the following:
+1. Builds the `approval-request-controller:latest` image
+2. Loads the image into the kind hub cluster
+3. Verifies that required kubefleet CRDs are installed
+4. Installs the controller via Helm with the custom CRDs (MetricCollector, MetricCollectorReport, WorkloadTracker)
+5. Verifies the installation
+
 ### 5. Install Metric Collector (Member Clusters)
 
-On each member cluster, install the metric collector:
+On each member cluster, install the metric collector. The installation script will automatically build and load both the metric-collector and metric-app images to all specified member clusters:
 
 ```bash
 cd standalone-metric-collector
 
-# Create hub token secret (replace with actual hub token)
-kubectl create secret generic hub-token \
-  --from-literal=token=<your-hub-token> \
-  -n fleet-system
-
-# Install via Helm
-helm install metric-collector ./charts/metric-collector \
-  --namespace fleet-system \
-  --set memberCluster.name=<cluster-name> \
-  --set hubCluster.url=https://<hub-cluster-address>:6443 \
-  --set prometheus.url=http://prometheus.test-ns:9090
+# Run the installation script for all member clusters
+# This builds both metric-collector and metric-app images and loads them into each cluster
+./install-on-member.sh 3
 ```
 
-Repeat for each member cluster with the appropriate cluster name.
+The script performs the following for each member cluster:
+1. Builds the `metric-collector:latest` image
+2. Builds the `metric-app:local` image
+3. Loads both images into each kind cluster
+4. Creates hub token secret with proper RBAC
+5. Installs the metric-collector via Helm
+
+The `metric-app:local` image is pre-loaded so it's available when you propagate the sample-metric-app deployment from hub to member clusters.
 
 ## Verification