LXD Gateway should inherit tz data from host /etc/timezone

[KathrynMorgan]

See config: https://github.com/KathrynMorgan/mini-stack/blob/master/3_LXD_Network_Gateway/aux/config/system#L11

[KathrynMorgan]

curl ip-api.com
curl ip-api.com/json 2>/dev/null | jq .timezone