Use Docker secrets for the JWT token

I use Docker Compose to run Whiteboard, and currently I define the JWT token using the JWT_SECRET_KEY environment variable like this:

version: '3.7'
services:
  nextcloud-whiteboard-server:
    image: ghcr.io/nextcloud-releases/whiteboard:release
    ports:
      - 3002:3002
    environment:
      - NEXTCLOUD_URL=https://nextcloud.local
      - JWT_SECRET_KEY=some-random-key

I would like to define the JWT token using Docker Secrets like this:

version: '3.7'
secrets:
  whiteboard_jwt_token:
    file: whiteboard_jwt_token
services:
  nextcloud-whiteboard-server:
    image: ghcr.io/nextcloud-releases/whiteboard:release
    ports:
      - 3002:3002
    secrets:
      - whiteboard_jwt_token
    environment:
      - NEXTCLOUD_URL=https://nextcloud.local
      - JWT_SECRET_KEY_FILE=/run/secrets/whiteboard_jwt_token

Would it be possible to implement this feature?

Start by locating where the server reads JWT_SECRET_KEY and reviewing the Docker Compose deployment configuration. Check how a JWT_SECRET_KEY_FILE value could be handled alongside the existing environment variable, then verify that a mounted Docker secret is accepted without breaking the current configuration.