Another thought on this: there are actually two compute requirements aren’t there?
- build the image;
- run the image.
One way of making use of remote compute would be to try to build images. Push a build to N @home clients, get a checksum for the built image back, if there is consensus, accept one of the consensus checksum images back for the image hub. It could be slow, but it might be useful if you need to rebuild every image after eg a repo2docker update that changes the base image or build steps?