cronjob to sync resources needs to be updated to use alpine cron in docker image

[davidcaron]

Logging and file paths need to be modified, the defaults for cron on alpine are:

bash-5.0# crond --help 
BusyBox v1.30.1 (2019-06-12 17:51:55 UTC) multi-call binary. 

Usage: crond -fbS -l N -d N -L LOGFILE -c DIR

        -f      Foreground
        -b      Background (default)
        -S      Log to syslog (default)
        -l N    Set log level. Most verbose 0, default 8
        -d N    Set log level, log to stderr
        -L FILE Log to FILE
        -c DIR  Cron dir. Default:/var/spool/cron/crontabs

[fmigneault]

I'm also working on #173 , #180. Making a new "CONFIGURATION.rst" file with details.
We should also add a section about sync-resources and the cron setup somewhere.

Edit
See file introduced in #227.
Also we should refer to file magpie-cron