Following the documentation to receive the logs from docker, the module configuration for a Linux configuration is the following :

<Input in>
    Module  im_file
    File    '/var/lib/docker/containers/*/*-json.log'
    <Exec>
        parse_json();
        $HostID = file_basename(file_name());
        $HostID =~ s/-json.log//;
    </Exec>
</Input>

However, in Windows, docker is running inside a WSL2 instance. this is why I replace the path with the docker for desktop equivalent :
\\\\wsl$\docker-desktop-data\version-pack-data\community\docker\containers\\*-json.log

Now, this works only if we launch nxlog from a cmd terminal, with the -f option to run in foreground.
When it is running as a Windows service, it throws an error, unable to access the files. It seems it can't resolve the \\wsl$ in the path

How to access Docker WSL2 logs from Windows ?