Where is located the env file related to CLI environment settings?

Hi!
When using docker-compose, I'd like to provide an env file in

docker-compose.yaml

docker-compose.yaml

rather than repeating all my variables one by one like this:

    environment:
      FAPI_ENVIRONMENT: ${FAPI_ENVIRONMENT}
      FAPI_FRONT_URL: ${FAPI_FRONT_URL}
      FAPI_BACK_URL: ${FAPI_BACK_URL}

    environment:
      FAPI_ENVIRONMENT: ${FAPI_ENVIRONMENT}
      FAPI_FRONT_URL: ${FAPI_FRONT_URL}
      FAPI_BACK_URL: ${FAPI_BACK_URL}

How can I do this? I think this is related to where are saved the environment variables that I set in the CLI (cf screenshot).
Thanks a lot.