Ability to define environment variables in deploy settings

[SoraMakes]

Description

i would like to be able to define variables in a deploy block that are then available to the deployed docker-compose.yml like a env_files

example:

  POLL_CONFIG: |
    - url: https://github.com/example/example.git
      interval: 300
      deployments:
        - name: evaluation_deployment
          environment:
            - _DB_ROOT_PW: "abc"

i have a service like this in the docker-compose.yml

  db_backend:
    image: docker.io/bitnami/mariadb:11.4
    environment:
      MARIADB_USER: ${_DB_BACKEND_USER}
      MARIADB_PASSWORD: ${_DB_BACKEND_PW}
      MARIADB_ROOT_PASSWORD: ${_DB_ROOT_PW}

Use Case

Currently i have my deployments in portainer and have the secrets defined in the webui. They are then provided to the deployment through the stack.env file. As i am only using portainer for the GitOps feature i would like to replace it with doco-cd.

Additional Information

Managing secrets that way is totally sufficient in my scenario. A full blown secret management solution is just unnecessary overhead.