Errors using dovecot 2.4 container image

Dear Dovecot team,

I ran into troubles using the newly released 2.4 docker image.

The dovecot/dovenull users are apparently not part of the image -- hence the dovecot server fails to start up with a fatal error.

I'm using a vanilla configuration, default_login_user, etc. are not set.

Thanks for having a look!

Best regards,

Andreas