There are instructions in this best practices article: https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/ https://docs.docker.com/en

There are instructions in this best practices article: https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/ https://docs.docker.com/engine/userguide/eng-image/dockerfil... (Search for "as root")