Configuring authentik to be reachable via docker bridge network

[DominikFG]

Describe your question/
I have a docker-compose setup with multiple services. Most of which are background workers but still need client authentication. The services are connected via a Docker bridge network. Calling the token endpoint with client_credentials grant_type and the Docker-internal service name (https://idp:9000/application/o/token) of the Authentik server leads to a 405 response.

Doing the same request from the host with localhost:9000 instead of idp:9000 works.

What do I need to configure to make it work?

Relevant info
docker-compose.yml.txt

Screenshots

Logs
Output of docker-compose logs or kubectl logs respectively

Version and Deployment (please complete the following information):

• authentik version: 2024.8.3
• Deployment: docker-compose

Additional context
Add any other context about the problem here.