No autogenerated admin account and passwort on first run

I just deployed Mayan on a NAS system using the portainer compose.
Logsfiles look a bit ugly initially while postgres has to become active,
then the migrations run, and I can access the login screen.
There is no use-generated-passwort-and-then-change-it screen,
so I can’t log in.

=> What might’ve gone wrong on the initial install that prevented the admin account credentials from being created ?


P.S.: Initial attempt was using the mayan docker tag s4.3, I now retried with s4.6 to no avail.

Response to self: I retried with the docker compose yaml in portainer, and things work as advertised.
So, somewhere the portainer docs and files are borked:

Yours, Steffen