Here is a great tutorial on how to use Duplicacy with DigitalOcean Spaces: How to Manage Backups to the Cloud with Duplicacy | DigitalOcean
Maybe add an explanation of the duplicacy terminology, especially that a repository signifies local files while the term is more commonly associated with remote files. (Indeed, you even use the term in that sense in the tutorial when you mention the github repository.)
Very interesting and detailed indeed.