Uploading of env variables from host machine to dockercompose

Docker Engine Compose
1

Heelo Everyone
I am facing one issue while trying to upload env defined over host machine using export auth=variable & in docker compose file it is defined as givent below:

services:
  packer:
    image: imagename
    working_dir: /data/src/GCE
    # env_file: .env
    environment:
      - variabledocker=${auth}
    volumes:
    - "../.:/data"

but i am getting below error:
auth variable is not set defaulting to blank string
I also check on host machine using command env | grep auth it is showing the variable what could be the issue

2

What is the version of Docker Compose? If auth exists on the host it should work in the compose file.
Are you using Docker locally or with a remote connection?
And finally, can you share the commands that we can just run by copy-pasting them to reproduce the issue?