Hello! There is already an episode on Docker (https://www.driftingruby.com/episodes/intro-to-docker-on-windows). Even though it is on Windows, it is still very applicable to any OS; including macOS. Personally, I prefer using RVM without docker for my development environment. However, since I run macOS on my development machine which is very different from the production instance, I will periodically launch a VM instance to ensure everything is working properly. Since most of my applications are running the AWS Linux image (very closely related to Centos), I'll make sure that assets are precompiled and working properly. The bootstrapping scripts that I have to initialize new instances are tested in my VMs. Is there anything beyond this episode that you would like to see?