Environment file updates

16.3.0c

db_user_password=
piwigo_port=8080
timezone=<TIMEZONE>
+ PIWIGO_UID=<UID>
+ PIWIGO_GID=<GID>

Default to 1000:1000 if left blank, this allow non root users to copy or edit files in the piwigo-data/piwigo/ folder

db_user_password=
piwigo_port=8080
+ timezone=<TIMEZONE>

You can use any timezone listed by timedatectl list-timezones (eg: Europe/Paris)

+ db_user_password=
+ piwigo_port=8080