Is cron jobs under the "app" user working?

[mech]

Hi, normally I use "whenever" for my Rails and it will create crontab under root user. Somehow it mess with my mounted volumes and now I see my production.log suddenly was created under root user and not the usual app user.

I figure it must have been changed during log rotation. In order to fix this, I am thinking to create cron jobs under "app" user, but somehow it will not run no matter how I try.

I have tried using "whenever -u app" as well as physically "docker exec" into my container and "su app" to create a crontab under "app" user. Nothing seems to work.

If cron installed as root user, everything is fine though.