interpolation env file parameter

[G3nomaly]

Description

Request

I would love to see add a top-level Compose field for env files used only for Compose-file interpolation.

Example:

interpolation_env_file:
  - ./config/compose.env

services:
  app:
    image: "example/app"
    env_file:
      - ./config/app.env
    port:
      - ${INTERNAL}:${EXTERNAL}

Currently the only way to do this is through a top level compose file. But this limits usage in ways I can not maintain. forcing people to use a top level compose is near impossible. but allowing us to set it from the compose file would fix it.