Heredocs (described in the docs[1] under "shell form") was introduced 3 years ago[1]. The flag '--squash' has been in podman for quite a while[2]. It might be t

Heredocs (described in the docs[1] under "shell form") was introduced 3 years ago[1]. The flag '--squash' has been in podman for quite a while[2]. It might be time for you to upgrade your tooling. [0]: https://docs.docker.com/reference/dockerfile/#shell-form https://docs.docker.com/reference/dockerfile/#shell-form [1]: https://www.docker.com/blog/introduction-to-heredocs-in-dockerfiles/ https://www.docker.com/blog/introduction-to-heredocs-in-dock... [2]: https://docs.podman.io/en/latest/markdown/podman-build.1.html#squash https://docs.podman.io/en/latest/markdown/podman-build.1.htm...