feat(add Kubernetes Docs)

Signed-off-by: aushafy <aushafy@gmail.com>

README.md

@@ -41,6 +41,24 @@ docker run -p 22:22 -d atmoz/sftp foo:pass:::upload
 
 User "foo" with password "pass" can login with sftp and upload files to a folder called "upload". No mounted directories or custom UID/GID. Later you can inspect the files and use `--volumes-from` to mount them somewhere else (or see next example).
 
+## Simplest kubernetes deployment example
+```
+kubectl apply -f https://raw.githubusercontent.com/aushafy/sftp/master/examples/kubernetes/simplest-deployment.yaml
+```
+
+Warning! do not apply this manifest to the production environment, this is only for testing! data written on to SFTP server would be erased during restart or rollout
+
+### Testing SFTP Server on Kubernetes
+```
+kubectl port-forward svc/sftp-server 2222:22
+```
+
+then open another terminal and run
+
+```
+sftp -P 2222 foo@localhost 
+```
+
 ## Sharing a directory from your computer
 
 Let's mount a directory and set UID:

examples/kubernetes/simplest-deployment.yaml

@@ -0,0 +1,36 @@
+# Warning!
+# do not apply this manifest to the production environment, this is only for testing
+# data written on to SFTP server would be erased during restart or rollout
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: sftp-server
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: sftp-server
+  template:
+    metadata:
+      labels:
+        app: sftp-server
+    spec:
+      containers:
+      - name: sftp-server
+        image: atmoz/sftp:alpine
+        ports:
+        - containerPort: 22
+        args: ["foo:pass:::upload"]
+---
+apiVersion: v1
+kind: Service
+metadata:
+  name: sftp-server
+spec:
+  selector:
+    app: sftp-server
+  ports:
+    - protocol: TCP
+      port: 22
+      targetPort: 22
+  type: ClusterIP