Shipped in 0.1.8; Images -> Build Image (context dir, tag, build args). It drives Apple's buildkit shim directly over vsock, no docker needed. brew upgrade davit or the in-app updater will get it.
Docker Desktop/Obstack start a single VM that runs all your containers. This means that you'll have to scale it accordingly. Davit uses Apple Containers that runs a very thin VM for each container you spin up. Depending on your use case it's more, less or equivalently effcient.
With nothing running, the platform's background services idle at roughly 25 MB. Docker desktop starts a single VM to host all containers and will reserve memory to do so. Davit itself is about 25mb and then each container will use the memory up to what you allocate for it.