Update k3d cluster create example (radius-project#1193)

* Update k3d cluster create command to disable servicelb

Signed-off-by: Brooke Hamilton <45323234+brooke-hamilton@users.noreply.github.com>

* Improve explanation of k3d cluster configuration

Signed-off-by: Brooke Hamilton <45323234+brooke-hamilton@users.noreply.github.com>

* Add balancer to custom spell list

Signed-off-by: Brooke Hamilton <45323234+brooke-hamilton@users.noreply.github.com>

---------

Signed-off-by: Brooke Hamilton <45323234+brooke-hamilton@users.noreply.github.com>

.github/config/en-custom.txt

@@ -439,6 +439,7 @@ tcp
 BucketName
 roadmap
 Balancer
+balancer
 vHost
 URI
 uri

docs/content/guides/operations/kubernetes/overview/index.md

@@ -83,10 +83,21 @@ First, ensure that memory resource is 8GB or more in `Resource` setting of `Pref
 softwareupdate --install-rosetta --agree-to-license
 ```
 
-Next, use the following commands to create a new cluster and install the Radius control plane, along with a new environment:
+Use the following command to create a new cluster. and install the Radius control plane, along with a new environment: 
+
+- The first parameter adds a port mapping which routes traffic from the local machine into the cluster. 
+- The second parameter disables [`traefik`](https://k3d.io/v5.1.0/usage/k3s/#traefik) pods because Radius provides an ingress controller.
+- The third parameter disables the [k3d internal load balancer](https://k3d.io/v5.1.0/usage/k3s/#servicelb-klipper-lb).
+
+The `rad install` command is configured to route localhost traffic on port 8081 into the cluster.
+
+```bash
+k3d cluster create -p "8081:80@loadbalancer" --k3s-arg "--disable=traefik@server:*" --k3s-arg "--disable=servicelb@server:*"
+```
+
+Next, install the Radius control plane, along with a new environment. The `rad install` command below adds a parameter to override the default public endpoint so that Radius knows that traffic from the local machine will enter the pod on port 8081:
 
 ```bash
-k3d cluster create -p "8081:80@loadbalancer" --k3s-arg "--disable=traefik@server:0"
 rad install kubernetes --set rp.publicEndpointOverride=localhost:8081
 rad init
 ```