services:
  app:
    image: nopush/podman-compose-test
    command: ["/bin/busybox", "sh", "-c", "env | grep ZZVAR3"]
    # 'env_file:' section is not used, so .env file is searched in the same directory as compose.yml
    # file
    environment:
        # this is short syntax: podman-compose takes only this variable value from '.env' file and
        # sends it to container environment
        - ZZVAR3