[Bug] KubeRay does not work on M1 macs. (#869)

The nightly docker images for arm64 are available. See ray-project/ray#31537 (comment) for more details. Hence, users can run Ray in Docker containers on ARM machines (including Mac M1) and on ARM cloud instances (e.g. AWS Graviton).

README.md

@@ -22,7 +22,8 @@ We also recommend checking out the official Ray guides for deploying on Kubernet
 
 ## Quick Start
 
-Please choose the version you would like to install. The examples below use the latest stable version `v0.4.0`.
+* Try this [end-to-end example](helm-chart/ray-cluster/README.md)!
+* Please choose the version you would like to install. The examples below use the latest stable version `v0.4.0`.
 
 | Version  |  Stable |  Suggested Kubernetes Version |
 |----------|:-------:|------------------------------:|

helm-chart/ray-cluster/README.md

@@ -20,7 +20,11 @@ helm repo add kuberay https://ray-project.github.io/kuberay-helm/
 helm install kuberay-operator kuberay/kuberay-operator --version 0.4.0
 
 # Step 4: Install a RayCluster custom resource
+# (For x86_64 users)
 helm install raycluster kuberay/ray-cluster --version 0.4.0
+# (For arm64 users, e.g. Mac M1)
+# See here for all available arm64 images: https://hub.docker.com/r/rayproject/ray/tags?page=1&name=aarch64
+helm install raycluster kuberay/ray-cluster --version 0.4.0 --set image.tag=nightly-aarch64
 
 # Step 5: Verify the installation of KubeRay operator and RayCluster 
 kubectl get pods