I am trying to install Lemmy with Docker. I followed the instructions here but I get the following error message:

ERROR: The Compose file './docker-compose.yml' is invalid because:
Invalid top-level property "x-logging". Valid top-level sections for this Compose file are: version, services, networks, volumes, secrets, configs, and extensions starting with "x-".

It says extensions start with “x-”, so I assume that I need to install some extension regarding to logging. This is straightforward, but apparently I haven’t been able to find the right keywords to ask Google…

Could anyone point me to this required extension and how to install it?