Following on from my previous post on the Docker Official Images, in this post I’ll go through some tips and techniques for writing Dockerfiles that I learnt from the official images. 1. Prefer Debian The majority of Dockerfiles for official images are based on Debian, either directly or through another image. The version is usually pegged to a given distribution, normally wheezy (at time of writing, the stable distribution), but several images use jessie (in testing) and even sid (unstable). …