That seems like a perfectly good idiom and it’s fantastic to hear that Dockerfiles support heredocs — I had no idea, thank you! https://www.docker.com/blog/int

That seems like a perfectly good idiom and it’s fantastic to hear that Dockerfiles support heredocs — I had no idea, thank you! https://www.docker.com/blog/introduction-to-heredocs-in-dockerfiles/ https://www.docker.com/blog/introduction-to-heredocs-in-dock... It would still be possible to accidentally reference uninitialized environment variables in contexts other than RUN though. Having those be treated as errors would be useful.