added docker cron image build environment

crontab

@@ -0,0 +1,8 @@
+# do daily/weekly/monthly maintenance
+# min   hour    day     month   weekday command
+
+# Copyright (c) 2023 · Bryan Joshua Pedini
+# LICENSE = gpl3
+# see the LICENSE file for more details
+
+*       *       *       *       *       echo "No cron job set, please set cron jobs, refer to the documentation"