docs: add Kubernetes restore example

docs/how-tos/restore-from-ssh.md

@@ -47,4 +47,52 @@ services:
       - web
 networks:
   web:
+```
+## Restore on Kubernetes
+
+Simple Kubernetes CronJob usage:
+
+```yaml
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: bkup-job
+spec:
+  schedule: "0 1 * * *"
+  jobTemplate:
+    spec:
+      template:
+        spec:
+          containers:
+          - name: mysql-bkup
+            image: jkaninda/mysql-bkup
+            command:
+            - /bin/sh
+            - -c
+            - mysql-bkup restore -s ssh -f store_20231219_022941.sql.gz
+            env:
+              - name: DB_PORT
+                value: "3306" 
+              - name: DB_HOST
+                value: ""
+              - name: DB_NAME
+                value: ""
+              - name: DB_USERNAME
+                value: ""
+              # Please use secret!
+              - name: DB_PASSWORD
+                value: ""
+              - name: SSH_HOST_NAME
+                value: ""
+              - name: SSH_PORT
+                value: "22"
+              - name: SSH_USER
+                value: "xxx"
+              - name: SSH_REMOTE_PATH
+                value: "/home/jkaninda/backups"    
+              - name: AWS_ACCESS_KEY
+                value: "xxxx"        
+              - name: SSH_IDENTIFY_FILE
+                value: "/tmp/id_ed25519"
+          restartPolicy: Never
 ```