Possible issue: we've had reports of users not being able to login via SSH with this image as are now investigating. In the meantime, please use the previous 1.17.2 image instead.
fluidd: v1.18.2
See the fluidd docs for installation details.
Known issue: IPv6 users won't be able to log into fluidd because of IPv6 subnets not being handled properly in the moonraker.conf. Make sure to add your IPv6 subnet (most likely starting with 2001 or 2002) to your trusted_clients section. If in doubt, please use the 1.16.2 image instead, and update fluidd to the latest version after installing.