Remove codespaces and add link to k3d config

docs/content/getting-started/index.md

@@ -16,16 +16,17 @@ This guide will show you how to quickly get started with Radius. You'll walk thr
 
 {{< image src="diagram.png" alt="Diagram of the application and its resources" width="500px" >}}
 
+<!-- commenting until we enable free minutes to try Codepaces
 {{< alert title="🚀 Run in a <b>free</b> GitHub Codespace" color="primary" >}}
 The Radius getting-started guide can be [run **for free** in a GitHub Codespace](https://github.blog/changelog/2022-11-09-codespaces-for-free-and-pro-accounts/). Visit the following link to get started in seconds:
 
 [![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/radius-project/samples)
-{{< /alert >}}
+{{< /alert >}}-->
 
 ## 1. Have your Kubernetes cluster handy
 
 Radius runs inside [Kubernetes]({{< ref "guides/operations/kubernetes" >}}). However you run Kubernetes, get a cluster ready.
-> *If you don't have a preferred way to create Kubernetes clusters, you could try using [k3d](https://k3d.io/), which runs a minimal Kubernetes distribution in Docker.*
+> *If you don't have a preferred way to create Kubernetes clusters, you could try using [k3d](https://k3d.io/), which runs a minimal Kubernetes distribution in Docker. Make sure to apply the [recommended configuration]({{< ref "guides/operations/kubernetes/overview##supported-kubernetes-clusters" >}})*
 
 Ensure your cluster is set as your current context: