I am using Trellis and I have shell script that makes sql dump backup file from my production database. Now I would like to make crontab to production server so it makes backup once a week. I was thinking to ssh to my prod server and do crontab stuff there but I think that is bad practice. So should I edit ansible script or something to make it happen in Trellis way? 
Thank you for guiding me! I made follow up article here Add automated db backups as part of Trellis?