I have been using Docker for past few years as a dev environment. It's easy to set up, run and maintain. Recently I decided to containerise one of my projects and check if running docker on production would be as easy as running it locally.
Ever since I started building websites I always used some kind of AMP stack. As my skills grew my stack was growing with it. First problems occurred when we had two major versions of PHP out in the wild - 4 and 5. After a while problems were piling up as I was adding Redis, Mongo, APC, Memcached, Elasticsearch and other popular tools to my stack.