Warning appearing in docker generate config

When running this command from the canaille documentation:

docker run -it --entrypoint canaille yaalcoop/canaille:latest config dump > canaille.toml

I get this warning line on the beginning of my canaille.toml file:

[2025-06-17 08:27:17,175] -  - WARNING in oauth: The 'SERVER_NAME' configuration parameter is unset. JWT client authentication is disabled.