### Start with Docker

I've started trying stuff within my hosting machine so I'd more confidently
build an image later. It didn't pay off. Just type inside the Dockerfile
instead of the terminal (shell).

### Give apprentice steps

Nevermind the [state of the art][minimize-layers] when you're starting off:

- Maximize the number of layers when you're playing around with stuff so you
  benefit the most of cached layers -- no need to run each command within a
  giant `RUN` directive

And then

- [Optimize][optimize-later] (e.g.: wrap up everything within a single `RUN`)
  when you finished tweaking

[minimize-layers]: https://docs.docker.com/engine/userguide/eng-image/dockerfile_best-practices/#minimize-the-number-of-layers
[optimize-later]: http://wiki.c2.com/?OptimizeLater