Update apiserver chart location in readme

[psschwei]

Signed-off-by: Paul S. Schweigert [email protected]

Why are these changes needed?

The README for the apiserver has an incorrect location for the helm chart (see below). This PR updates the READ to use the correct helm chart location.

$ helm -n ray-system install kuberay-apiserver kuberay/helm-chart/kuberay-apiserver
Error: INSTALLATION FAILED: chart "helm-chart/kuberay-apiserver" matching  not found in kuberay index. (try 'helm repo update'): no chart name found

$ helm -n ray-system install kuberay-apiserver kuberay/kuberay-apiserver
NAME: kuberay-apiserver
LAST DEPLOYED: Mon Feb  6 12:02:18 2023
NAMESPACE: ray-system
STATUS: deployed
REVISION: 1
TEST SUITE: None

Related issue number

n/a

Checks

Note: this PR updates a readme, so there shouldn't be any impact to the tests.

• I've made sure the tests are passing.
• Testing Strategy
  • Unit tests
  • Manual tests
  • This PR is not tested :(

[psschwei]

Adding @Jeffwan @scarlet25151 for review

[kevin85421]

Maybe you can provide the methods to install the stable release chart from Helm repo and the nightly chart via cloning KubeRay repo. You can refer to this doc.

[psschwei]

@kevin85421 I added an "Installing" section at the beginning to cover the various install scenarios

[kevin85421]

Gentle ping some KubeRay APIServer folks for review. @Jeffwan @scarlet25151 @wilsonwang371

[wilsonwang371]

chenyu and jiaxin are more familiar with apiserver

[Jeffwan]

sorry for late. thanks for the correction and the change looks good to me

[kevin85421]

This PR only updates the document, so it has no relationship with the CI failure. Merge it.