add argocd demo (#1095)

Author: jwtty

docs/README.md

@@ -11,6 +11,7 @@ You may also:
 * Learn more about Fleet in [Concepts](concepts/README.md).
 * Perform specific tasks with the help of [How-To Guides](howtos/README.md).
 * Follow the instructions to see how Fleet can integrate with your development/ops patterns in [Tutorials](tutorials/README.md).
+* Discover how Fleet seamlessly integrates with widely-adopted tools like ArgoCD to enhance your multi-cluster application management capabilities in [Demos](demos/README.md).
 * Read the [Fleet API Reference](api-references.md).
 * Solve technical issues by following the [Troubleshooting Guides](troubleshooting/README.md)
 * Find answers to some of the common questions on Fleet in [Fleet FAQ](faq.md).

docs/demos/ArgoCD/fleet-argocd-integration.jpg

@@ -0,0 +1,52 @@
+# This CRP manifest is used to install ArgoCD from hub cluster to member clusters.
+apiVersion: placement.kubernetes-fleet.io/v1beta1
+kind: ClusterResourcePlacement
+metadata:
+  name: crp-argocd
+spec:
+  policy:
+    placementType: PickAll
+  strategy:
+    applyStrategy:
+      type: ServerSideApply
+  resourceSelectors:
+  - group: apiextensions.k8s.io
+    kind: CustomResourceDefinition
+    name: applications.argoproj.io
+    version: v1
+  - group: apiextensions.k8s.io
+    kind: CustomResourceDefinition
+    name: applicationsets.argoproj.io
+    version: v1
+  - group: apiextensions.k8s.io
+    kind: CustomResourceDefinition
+    name: appprojects.argoproj.io
+    version: v1
+  - group: rbac.authorization.k8s.io
+    kind: ClusterRole
+    name: argocd-server
+    version: v1
+  - group: rbac.authorization.k8s.io
+    kind: ClusterRole
+    name: argocd-applicationset-controller
+    version: v1
+  - group: rbac.authorization.k8s.io
+    kind: ClusterRole
+    name: argocd-application-controller
+    version: v1
+  - group: rbac.authorization.k8s.io
+    kind: ClusterRoleBinding
+    name: argocd-server
+    version: v1
+  - group: rbac.authorization.k8s.io
+    kind: ClusterRoleBinding
+    name: argocd-applicationset-controller
+    version: v1
+  - group: rbac.authorization.k8s.io
+    kind: ClusterRoleBinding
+    name: argocd-application-controller
+    version: v1
+  - group: ""
+    kind: Namespace
+    name: argocd
+    version: v1