stack_compose_base: version: '3' services: busybox: image: "{{ docker_test_image_busybox }}:latest" command: sleep 3600 stack_compose_overrides: version: '3' services: busybox: environment: envvar: value stack_update_expected_diff: '{"test_stack_busybox": {"TaskTemplate": {"ContainerSpec": {"Env": ["envvar=value"]}}}}'