These answers are provided by our Community. If you find them useful, show some love by clicking the heart. If you run into issues leave a comment, or add your own answer to help others.
CoreOS is currently the only Docker-centric OS we provide. There is also an Ubuntu 14.04-based Docker “One-Click” application. It is simply the latest version of Docker pre-installed on a standard Ubuntu server image.
Project Atomic and Ubuntu Snappy are both on our radar. We use UserVoice to track feature requests and gauge user demand. You can show your support for bringing Atomic to DO by voting on this existing request there. You can also subscribe to get updates to the status.
The developer cloud
Scale up as you grow — whether you're running one virtual machine or ten thousand.
From GPU-powered inference and Kubernetes to managed databases and storage, get everything you need to build, scale, and deploy intelligent applications.