Replace crontab file with a printf

etc/crontab

@@ -1,16 +0,0 @@
-SHELL=/bin/bash
-PATH=/sbin:/bin:/usr/sbin:/usr/bin
-MAILTO=root
-
-# For details see man 4 crontabs
-
-# Example of job definition:
-# .---------------- minute (0 - 59)
-# |  .------------- hour (0 - 23)
-# |  |  .---------- day of month (1 - 31)
-# |  |  |  .------- month (1 - 12) OR jan,feb,mar,apr ...
-# |  |  |  |  .---- day of week (0 - 6) (Sunday=0 or 7) OR sun,mon,tue,wed,thu,fri,sat
-# |  |  |  |  |
-# *  *  *  *  * user-name  command to be executed
-
-0 12 * * * root sleep $((RANDOM % 3600)) && certbot renew -q