podman-compose/tests/interpolation/docker-compose-colon-question-error.yml

version: "3.7"
services:
    variables:
        image: busybox
        command: ["/bin/busybox", "sh", "-c", "export | grep EXAMPLE"]
        environment:
            EXAMPLE_COLON_QUESTION_ERROR: ${NOT_A_VARIABLE:?Missing variable}