Write "docker-compose setup" article

[waxlamp]

https://docs.google.com/document/d/1cqoISKTlpclh89jBXLHECMi-8pbcjvV5VDvilrPIezk/edit#heading=h.r0lrdduqqrue

This article can shed light on some of the value-add we are getting from cultivating this ecosystem. In particular, this can demonstrate how our devs can get spun up very quickly, working on a dev version of a project that follows Factor X of the 12 Factor App manifesto.