add new env var

.drone.yml

@@ -27,6 +27,7 @@ steps:
       - mv base_pack/* unleashed-firmware/applications_user/
       - ./parse_api_ver.sh
       - cd unleashed-firmware
+      - export FBT_GIT_SUBMODULE_SHALLOW=1
       - ./fbt COMPACT=1 DEBUG=0 updater_package
       - mkdir artifacts-base
       - mkdir artifacts-totp
@@ -65,6 +66,7 @@ steps:
       - mv apps_source_code/* unleashed-firmware/applications_user/
       - mv non_catalog_apps/* unleashed-firmware/applications_user/
       - cd unleashed-firmware
+      - export FBT_GIT_SUBMODULE_SHALLOW=1
       - ./fbt COMPACT=1 DEBUG=0 updater_package
       - mkdir artifacts-extra
       - mv assets/resources/apps/* artifacts-extra/