I have the same issue with last release (https://github.com/netbox-community/netbox-docker/releases/tag/2.8.0 )

I have to set “trust” in /var/lib/postgresql/data/pg_hba.conf

host all all all trust

how did you set:

host all all all trust

access your docker container and make insert this line or fix the pre-available line

docker exec -it _netbox-docker-postgres-1_ /bin/bash

vi /var/lib/postgresql/data/pg_hba.conf

Thats it