jeffsi-meet-docker/base/rootfs/etc/cont-init.d/01-set-timezone

#!/usr/bin/with-contenv bash

if [[ ! -z "$TZ" ]]; then
    if [[ -f /usr/share/zoneinfo/$TZ ]]; then
         ln -sf /usr/share/zoneinfo/$TZ /etc/localtime
         echo "$TZ" >  /etc/timezone
    else
        echo "WARNING: $TZ is not a valid time zone."
    fi
fi