fix: remove CONTAINER files on app clone

This will ensure we don't accidentally destroy old applications if the new app isn't rebuilt or the rebuild fails.

Closes #3249

plugins/scheduler-docker-local/post-app-clone-setup

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -eo pipefail; [[ $DOKKU_TRACE ]] && set -x
+
+scheduler-docker-local-post-app-clone-setup() {
+  declare desc="removes docker-local files when setting up a clone"
+  declare OLD_APP="$1" NEW_APP="$2"
+  local APP_DIR="$DOKKU_ROOT/$NEW_APP"
+
+  find "$APP_DIR" -type f -name 'CONTAINER.*' -exec rm {} \;
+}
+
+scheduler-docker-local-post-app-clone-setup "$@"