More than one update per day

[jacotec]

First of all thank you for making this docker version of "new-easyepg" :-)

Short question / proposal: Currently it's only possible to run one EPG update per day. I'm not sure how often Magenta is updating the EPG source, but with the old "easyepg" I ran it at least once in the morning and another run in the late afternoon to catch short-term changes.

Is there a way to define more than one run? Or to have the option to give the cron line in the env variables as an alternative?