TL;DR: Needed a way to easily deploy and manage legacy and new sites without spending a lot of money. Dokku gives me the awesome Heroku developer experience on a cheap VPS box.

I normally work on different and very active projects in several testing environments. I needed a simple and fast way to generate visual regression tests between them, or even to just to compare my local environment to an integration server. However, it was cumbersome to edit backstop configuration files frequently just to change servers, thus I created a tool that simplifies the task a lot:

https://github.com/arturolinares/easy-vrt