Add Fleet server configs for new Apple VPP metadata endpoints

docs/Configuration/fleet-server-configuration.md

@@ -3226,6 +3226,20 @@ The best practice is to set this to 3x the number of new employees (end users) t
     sso_rate_limit_per_minute: 200
   ```
 
+### mdm.apple_vpp_app_metadata_api_bearer_token
+
+By default, Fleet retrieves [Apple App Store (VPP) metadata](https://developer.apple.com/documentation/devicemanagement/get-your-apps-metadata) from Apple using an API token from Fleet's Apple Developer account. This API token is hosted on fleetdm.com.
+
+If you have an [Apple Developer account that is enabled as MDM vendor](https://developer.apple.com/help/account/service-configurations/apps-and-books-for-organizations), you can optionally configure Fleet with your own API token. This way, Fleet can directly communicate with Apple.
+
+- Default value: none
+- Environment variable: `FLEET_MDM_APPLE_VPP_APP_METADATA_API_BEARER_TOKEN`
+- Config file format:
+  ```yaml
+  mdm:
+    apple_vpp_app_metadata_api_bearer_token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ92eyJzdWIiOiIxMjM0NTY3ODkwIiwibmFtZSI6Ikp
+  ```
+
 ## Partnerships
 
 ### partnerships_enable_secureframe