Compose v3: Make ability to specify source for ENV variables inside docker-compose file

[mrAndersen]

For example i have the following service

web:
    build:
            context: docker/fpm
            dockerfile: Dockerfile
            args:
                MY_VARIABLE_STATUS:  ${VARIABLE_NOT_FROM_ENV}

I want VARIABLE_NOT_FROM_ENV being resolved not from .env file and ALSO i don't want to write all the time --env-file argument running compose up command, so i assume you guys should make this as a config inside docker-compose.yaml itself

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