Configuring authentik to be reachable via docker bridge network

**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](https://github.com/user-attachments/files/17486362/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.