add database config

configuration.php

@@ -30,9 +30,13 @@
     // Describes the default email which Fusio uses as from address
     'fusio_mail_sender'        => env('APP_MAIL_SENDER')->string(),
 
+    // Indicates whether the database is enabled. If true it is possible to change the database schema through the
+    // backend
+    'fusio_database'           => true,
+
     // Indicates whether the marketplace is enabled. If yes it is possible to download and install other apps through
     // the backend
-    'fusio_marketplace'        => env('APP_MARKETPLACE')->bool(),
+    'fusio_marketplace'        => true,
 
     // The public url to the apps folder (i.e. http://acme.com/apps or http://apps.acme.com)
     'fusio_apps_url'           => env('APP_APPS_URL')->string(),