Add a Maintenance Section (#580)

* Add a Maintenance section

* Move the self-host section higher

* Add references to backup and upgrade

src/pages/selfhosted/selfhosted-quickstart.mdx

@@ -128,58 +128,28 @@ NetBird includes built-in local user management powered by an embedded <a href="
   ]} 
 />
 
+## Maintenance
+
+Once your NetBird instance is running, refer to these guides for ongoing maintenance:
+
+<Tiles
+  id="maintenance"
+  items={[
+    {
+      href: '/selfhosted/maintenance/backup',
+      name: 'Backup',
+      description: 'Back up your NetBird configuration and data to protect against data loss.',
+    },
+    {
+      href: '/selfhosted/maintenance/upgrade',
+      name: 'Upgrade',
+      description: 'Upgrade your NetBird installation to the latest version.',
+    },
+  ]}
+/>
+
 ---
 
-## Manage Installation
-
-### Backup
-
-To back up your NetBird installation, you need to copy the configuration files and the Management service databases.
-
-The configuration files are located in the folder where you ran the installation script. To back up, copy the files to a backup location:
-```bash
-mkdir backup
-cp docker-compose.yml Caddyfile dashboard.env management.json relay.env backup/
-```
-
-<Note>
-For detailed information about each configuration file and its options, see the [Configuration Files Reference](/selfhosted/configuration-files).
-</Note>
-To save the Management service databases, stop the Management service and copy the files from the store directory:
-```bash
-docker compose stop management
-docker compose cp -a management:/var/lib/netbird/ backup/
-docker compose start management
-```
-
-### Upgrade
-
-To upgrade NetBird to the latest version:
-
-1. Run the backup steps described in the [backup](#backup) section.
-2. Review the [release notes](https://github.com/netbirdio/netbird/releases) for any breaking changes.
-3. Pull the latest NetBird docker images:
-    ```bash
-    docker compose pull management dashboard signal relay
-    ```
-4. Restart the NetBird containers with the new images:
-    ```bash
-    docker compose up -d --force-recreate management dashboard signal relay
-    ```
-
-<Note>
-For upgrades from older versions (pre-v0.26.0), see the [Legacy upgrade notes](#legacy-self-hosting-with-zitadel-idp).
-</Note>
-
-### Remove
-To remove the NetBird installation and all related data from your server, run these commands from the folder where you installed NetBird:
-```bash
-# remove all NetBird-related containers and volumes (data)
-docker compose down --volumes
-# remove downloaded and generated config files
-rm -f docker-compose.yml Caddyfile dashboard.env management.json relay.env
-```
-
 ## Troubleshoot
 
 - **I can't access the `/setup` page**
@@ -198,7 +168,7 @@ For more troubleshooting help, see the [Troubleshooting guide](/selfhosted/troub
 
 ---
 
-## Get in touch
+## Get In Touch
 
 Feel free to ping us on [Slack](/slack-url) if you have any questions.