[DO NOT MERGE] add example

charts/retool/templates/june.yaml

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+kind: Service 
+apiVersion: v1 
+metadata:
+  name: hostname-service 
+spec:
+  # Expose the service on a static port on each node
+  # so that we can access the service from outside the cluster 
+  type: NodePort
+
+  # When the node receives a request on the static port (30163)
+  # "select pods with the label 'app' set to 'echo-hostname'"
+  # and forward the request to one of them
+  selector:
+    app: echo-hostname 
+
+  ports:
+    # Three types of ports for a service
+    # nodePort - a static port assigned on each the node
+    # port - port exposed internally in the cluster
+    # targetPort - the container port to send requests to
+    - nodePort: 30163
+      port: 8080 
+      targetPort: 80

charts/retool/templates/june2.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: mywebapp-deployment
+  labels:
+    app: mywebapp
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: mywebapp
+  template:
+    metadata:
+      labels:
+        app: mywebapp
+    spec:
+      containers:
+        - name: mywebapp-container
+          image: nginx:latest
+          ports:
+            - containerPort: 80