Install latest docker-ce-cli only

[yajo]

Currently we install moby-engine from fedora repos, which is not the best because it's outdated and it smells like at some point Fedora will stop supporting it because they love more podman (which is easy to understand OTOH).

Well, in any case, we should follow instructions from https://docs.docker.com/engine/install/fedora/ to install the latest docker in the image.

Another benefit is that then we can install docker-ce-cli package, which only contains the client binaries and not the engine itself. That should make the image thinner and much faster to build.