Portainer vs Seagull
I use portainer in prod
but I think seagull might be more appropriate for nethserver mostly because it's going direct to the point which is managing docker, container, image, ...
I think, If you're new, in seagull you're will find faster what you want.
(see the screenshot (https://github.com/tobegit3hub/seagull))
The big advantage of Portainer it is offer authentication
- Seagull is proposed on Yunohost and DPlateform (in prod or pseudoprod)
My wife have a 3month (extendable) contract;
we hope moving here in long term
Still managing my Swiss and Canadian client remotely