List of variables declared in .env

PUID=
PGID=
TZ=
USERDIR=
DATADIR=
HOSTNAME=
DOCKERDIR=
URL=
CF_ACCOUNT_ID=
CF_API_TOKEN=
CF_TUNNEL_PASSWORD=
CF_ZONE_ID=

For swag to work properly run it so it can populate the files it needs. Go in the config directory for swag /dns-conf and fill in the details for your DNS provider in one of the right files. After that restart and it should work properly