WIP-mg addon

Signed-off-by: sayedppqq <[email protected]>

docs/guides/mongodb/backup/kubestash/_index.md

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+---
+title: Backup & Restore MongoDB | KubeStash
+menu:
+  docs_{{ .version }}:
+    identifier: guides-mongodb-backup-kubestash
+    name: KubeStash Backup & Restore
+    parent: guides-mongodb-backup
+    weight: 20
+menu_name: docs_{{ .version }}
+---

docs/guides/mongodb/backup/kubestash/overview/_index.md

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+---
+title: MongoDB Backup & Restore Overview | KubeStash
+menu:
+  docs_{{ .version }}:
+    identifier: guides-mongodb-backup-kubestash-overview
+    name: Overview
+    parent: guides-mongodb-backup-kubestash
+    weight: 10
+menu_name: docs_{{ .version }}
+section_menu_id: guides
+---
+
+> New to KubeDB? Please start [here](/docs/README.md).
+
+{{< notice type="warning" message="This is an Enterprise-only feature. Please install [KubeStash Enterprise Edition] to try this feature. You can use KubeDB Enterprise license to install KubeStash Enterprise edition. Database backup with KubeStash is already included in the KubeDB Enterprise license. So, you don't need a separate license for KubeStash." >}}
+
+# MongoDB Backup & Restore Overview
+
+KubeDB can also uses [KubeStash](https://kubestash.com/) to backup and restore databases. KubeStash by AppsCode is a cloud native data backup and recovery solution for Kubernetes workloads. KubeStash utilizes [restic](https://github.com/restic/restic) to securely backup stateful applications to any cloud or on-prem storage backends (for example, S3, GCS, Azure Blob storage, Minio, NetApp, Dell EMC etc.).
+
+## How Backup Works
+
+The following diagram shows how KubeStash takes backup of a MongoDB database. Open the image in a new tab to see the enlarged version.
+
+<figure align="center">
+ <img alt="MongoDB Backup Overview" src="/docs/guides/mongodb/backup/kubestash/overview/images/backup_overview.svg">
+  <figcaption align="center">Fig: MongoDB Backup Overview</figcaption>
+</figure>