@Sigve-opedal_6476
Here is a solution
Create a network.
With that proget can reach inedo as they will be into the same network.
docker network create inedo-net

Inedo
docker run -d --name inedodb
--network inedo-net
-v ./inedo-data:/var/lib/postgresql/data
proget.inedo.com/productimages/inedo/inedodb:17.6

sudo chown 1000:1000 proget-database

Proget
docker run -d --name proget
--network inedo-net
-p 8624:80
-v ./proget-packages:/var/proget/packages
-v ./proget-backups:/var/proget/backups
-v ./proget-database:/var/proget/database
-e INEDO_DB_TYPE=inedodb
-e INEDO_DB_HOST=inedodb
-e INEDO_DB_USER=proget \
proget.inedo.com/productimages/inedo/proget:latest

I got also lot's of issue because the database directory must be empty.
I hope it will help you.