For me, this just means that the Docker service is not running (you may have to wait a bit for it to start)
error during connect: Post http://%2F%2F.%2Fpipe%2Fdocker_engine/v1.35/containers/vespa/start: open //./pipe/docker_engine: The system cannot find the file specified. In the default daemon configuration on Windows, the docker client must be run elevated to connect. This error may also indicate that the docker daemon is not running.
Error: failed to start containers: vespa