Disable TZ environment for fr24 container

[theyosh]

Hi,

I got an unhealthy fr24 container due to the fact that the date command runs in the configured timezone and fr24 is logging in UTC. Therefore the heath script will give unhealthy at the max 5 min data timeout. For me, I had a 2 hour difference between UTC and my own timezone.

By removing the docker compose environment - TZ=${FEEDER_TZ} it all works correctly. So on this page, it should be removed: https://sdr-enthusiasts.gitbook.io/ads-b/feeder-containers/feeding-flightradar24

As far I can judge, you should not set the timezone for the fr24 container (anymore).