chore: Update README for install instructions

README.md

@@ -1,17 +1,84 @@
-Rollout Extension
------------------
+# Rollout Extension
 
 The project introduces the Argo Rollout dashboard into the Argo CD Web UI.
 
 ![image](https://user-images.githubusercontent.com/426437/136460261-00d3dc31-ad20-4044-a7be-091803b8678f.png)
 
-# Quick Start
+## Install UI extension
 
-- Install Argo CD and Argo CD Extensions Controller: https://github.com/argoproj-labs/argocd-extensions
-- Create `argo-rollouts` extension in `argocd` namespace
+To install the extension use the [argocd-extension-installer](https://github.com/argoproj-labs/argocd-extension-installer) init container which runs during the startup of the argocd server.
+The init container downloads and extracts the JS file to `/tmp/extensions`. The argocd interface mounts the external JS file within the rollout resource.
 
+
+### Kustomize Patch
+
+```yaml
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: argocd-server
+spec:
+  template:
+    spec:
+      initContainers:
+        - name: rollout-extension
+          image: quay.io/argoprojlabs/argocd-extension-installer:v0.0.1
+          env:
+          - name: EXTENSION_URL
+            value: https://github.com/argoproj-labs/rollout-extension/releases/download/v0.3.4/extension.tar
+          volumeMounts:
+            - name: extensions
+              mountPath: /tmp/extensions/
+          securityContext:
+            runAsUser: 1000
+            allowPrivilegeEscalation: false
+      containers:
+        - name: argocd-server
+          volumeMounts:
+            - name: extensions
+              mountPath: /tmp/extensions/
+      volumes:
+        - name: extensions
+          emptyDir: {}
 ```
-kubectl apply -n argocd \
-    -f https://raw.githubusercontent.com/argoproj-labs/rollout-extension/v0.2.1/manifests/install.yaml
+
+### Helm Values
+
+#### Using `server.extensions`
+
+```yaml
+server:
+  extensions:
+    enabled: true
+    extensionList:
+      - name: rollout-extension
+        env:
+          - name: EXTENSION_URL
+            value: https://github.com/argoproj-labs/rollout-extension/releases/download/v0.3.4/extension.tar
 ```
 
+#### Using `server.initContainers`, `server.volumeMounts`, and `server.volumes` directly
+kubectl apply -f https://raw.githubusercontent.com/argoproj/argo-rollouts/master/docs/getting-started/basic/rollout.yaml
+kubectl apply -f https://raw.githubusercontent.com/argoproj/argo-rollouts/master/docs/getting-started/basic/service.yaml
+
+```yaml
+server:
+  initContainers:
+    - name: rollout-extension
+      image: quay.io/argoprojlabs/argocd-extension-installer:v0.0.1
+      env:
+      - name: EXTENSION_URL
+        value: https://github.com/argoproj-labs/rollout-extension/releases/download/v0.3.4/extension.tar
+      volumeMounts:
+        - name: extensions
+          mountPath: /tmp/extensions/
+      securityContext:
+        runAsUser: 1000
+        allowPrivilegeEscalation: false
+  volumeMounts:
+    - name: extensions
+      mountPath: /tmp/extensions/
+  volumes:
+    - name: extensions
+      emptyDir: {}
+```