The Dockerfile is my biggest issue with Docker. I really don't like to write shell scripts in there, but there are caching benefits (thanks to the limitations o

The Dockerfile is my biggest issue with Docker. I really don't like to write shell scripts in there, but there are caching benefits (thanks to the limitations of Docker) to inline everything in there. Although the idea is to have an endless chain of dependent images with small Dockerfiles on each step, the reality is different. I recently needed a monolithic image of having Nginx, Node.js, and Phusion Passenger, just merging the Dockerfiles doesn't work as each has a cleanup step that ruins things for the next one. I know it's great to have everything self-contained (pun intended) in a single Dockerfile - it's much easier to diff and display on Docker Hub, but this promotes bad practices without a doubt!