added kubeconfig code in the example + updated readme

Signed-off-by: Sam Alba <sam.alba@gmail.com>

examples/aws-eks/README.md

@@ -1,9 +1,12 @@
 # Kubernetes on AWS (EKS)
 
+This example creates a new EKS cluster and outputs its corresponding kubeconfig
+
 ## How to run
 
 ```sh
 dagger compute . \
     --input-string awsConfig.accessKey="MY_AWS_ACCESS_KEY" \
-    --input-string awsConfig.secretKey="MY_AWS_SECRET_KEY"
+    --input-string awsConfig.secretKey="MY_AWS_SECRET_KEY" \
+    | jq -j '.kubeconfig.kubeconfig' > kubeconfig
 ```

examples/aws-eks/infrastructure.cue

@@ -13,7 +13,7 @@ import (
 	workerNodeCapacity:     *3 | >=1
 	workerNodeInstanceType: *"t3.medium" | string
 
-	let clusterName = "\(namePrefix)eks-cluster"
+	clusterName: "\(namePrefix)eks-cluster"
 
 	eksControlPlane: cloudformation.#Stack & {
 		config:      awsConfig

examples/aws-eks/main.cue

@@ -2,6 +2,7 @@ package main
 
 import (
 	"dagger.io/aws"
+	"dagger.io/aws/eks"
 )
 
 // Fill using:
@@ -23,3 +24,8 @@ infra: #Infrastructure & {
 	workerNodeCapacity:     1
 	workerNodeInstanceType: "t3.small"
 }
+
+kubeconfig: eks.#KubeConfig & {
+	config:      awsConfig
+	clusterName: infra.clusterName
+}