Use .md extension for README

GitHub like Markdown files to have .md extensions. I just copypasta'd the .sh file so that GitHub will process the Markdown properly.

20-container-to-kubernetes/README.md

@@ -0,0 +1,28 @@
+# Kubectl
+
+Let's get this installed!
+
+[Installing Kubectl](https://kubernetes.io/docs/tasks/tools/install-kubectl/)
+
+The main CLI tool for Kubernetes
+
+[The best Kubectl resource on the internet](https://kubernetes.io/docs/reference/kubectl/cheatsheet/)
+
+# Running the container in Kubernetes
+
+```
+kubectl run <name> <command> <options> --image <image>
+kubectl run app-1 --image krisnova/kubernetes-workshop-app
+```
+
+# Inspecting the container
+
+```
+kubectl get deploy <name> -oyaml
+kubectl edit deploy <name>
+kubectl get pods
+kubectl logs <pod> -f
+kubectl explain <pod>
+kubectl describe <pod>
+alias kdump="kubectl get all --all-namespaces"
+```