-e PUID=${PUID:-1024}`# optional` `# for UserID` \
-e PGID=${PGID:-100}`# optional` `# for GroupID` \
-e TZ=${TZ:-Europe/Amsterdam}`# optional` `# specify a timezone to use, see this [list](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones#List).` \
-e SUBDOMAINS=subdomain1,subdomain2 `# multiple subdomains allowed, comma separated, no spaces, if your domain is user.duckdns.org you put user, not a sub-subdomain` \
-e TOKEN=token `# DuckDNS token` \
-e LOG_FILE=false`# optional` `# Set to `true` to log to file (also need to map /config).` \
-v ${BASEDIR:-/volume1/docker}/duckdns/config:/config `# optional` `# Used in conjunction with logging to file.` \