feat: configurable path to bpn xml files

config/packages/flysystem.yaml

@@ -1,13 +1,9 @@
 flysystem:
     storages:
-        default.storage:
-            adapter: 'local'
-            options:
-                directory: '%kernel.project_dir%/var/storage/default'
         xml_export.storage:
             adapter: 'local'
             options:
-                directory: '%kernel.project_dir%/var/xmlexport'
+                directory: '%env(XML_EXPORT_PATH)%'
         xml_dump.storage:
             adapter: 'local'
             options: