Building container images

As this book attempts to troubleshoot Docker, wouldn't it prove beneficial to reduce our chances for errors that we would have to troubleshoot in the first place? Fortunately for us, the Docker community (and the open source community at large) provides a healthy registry of base (or root) images that dramatically reduce errors and provide more repeatable processes. Searching the Docker Registry, we can find official and automated build statuses for a broad and growing array of container images. The Docker official repositories (https://docs.docker.com/docker-hub/official_repos/) are carefully organized collections of images supported by Docker Inc.-automated repositories that allow you to validate source and content of a particular image also exist.

A major thrust and theme of this chapter will be in basic Docker fundamentals; while they may seem trivial to the experienced container user, following some best practices and levels of standardization...