Add tenancy maintenance mode drivers

assets/config.php

@@ -242,6 +242,21 @@ return [
         // Stancl\Tenancy\Features\CrossDomainRedirect::class, // https://tenancyforlaravel.com/docs/v3/features/cross-domain-redirect
     ],
 
+    /**
+     * Maintenance mode driver
+     *
+     * These configuration options determine the driver used to determine and
+     * manage Tenancy's "maintenance mode" status. The "cache" driver will
+     * allow maintenance mode to be controlled across multiple machines.
+     *
+     * Supported drivers: "database", "cache"
+     *
+     */
+    'maintenance' => [
+        'driver' => env('TENANCY_DATABASE_DRIVER', 'database'),
+        // 'store'  => 'redis',
+    ],
+
     /**
      * Should tenancy routes be registered.
      *