Improved Kubernetes cluster documentation

kubernetes-example/service.yml

@@ -0,0 +1,16 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: nginx-service
+  namespace: web-test
+spec:
+  type: NodePort
+  selector:
+    app: nginx-deployment
+  ports:
+      # By default and for convenience, the `targetPort` is set to the same value as the `port` field.
+    - port: 80
+      targetPort: 80
+      # Optional field
+      # By default and for convenience, the Kubernetes control plane will allocate a port from a range (default: 30000-32767)
+      nodePort: 30007