For hosting static assets like images, DigitalOcean also provide an object storage solution similar to AWS’ S3. It’s API was designed to be inter-operable with S3, so you should be able to take advantage of the tools you you are already using. Find out more about Space in this article:

• An Introduction to DigitalOcean Spaces

The team over at GoRails has also put together a screen cast showing how to use Spaces from a Rails application that should give you a good idea about how to get started.