add some examples

node-server-example/README.md

@@ -0,0 +1,81 @@
+# Deploying a Node.js K8s Cluster with Kubectl
+
+
+Build the image:
+
+```
+make build:
+```
+
+Run the container:
+
+```
+make run
+```
+
+Check whether the server worked
+
+```
+make curl
+```
+
+Check container's status
+
+```
+$ make status
+```
+
+
+#### Other useful commands
+
+Exec inside the container:
+
+```
+$ docker exec -i -t <container name from status> /bin/bash
+```
+
+Check images in disk:
+
+```
+$ docker images
+```
+
+
+### Pushing the Registry to Kubernetes
+
+In a real production system, we’ll want to build images in one place, then run these images in the Kubernetes cluster. 
+
+The system that images for distribution is called a **container registry**.
+
+
+Using a `yaml` Kubernetes files (for example, the one inside `node_server_example/`), you can now deploy the image with:
+
+```
+$ kubectl create -f  node_example_kube_config.yaml
+```
+
+After that, you are able to create the service with:
+
+```
+$  kubectl expose deployment node-app-test
+```
+
+Also, check out the service status with:
+
+```
+$ kubectl get services
+```
+
+### Clean up
+
+Removing the service and the deployment when you are done:
+
+```
+$ kubectl delete service node-app-test
+$ kubectl delete deployment node-app-test
+```
+
+
+## Some References:
+
+* [Dockerfiles good practices](https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/#general-guidelines-and-recommendations).