driver: start implemeting bootstrap for docker

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

commands/root.go

@@ -1,6 +1,7 @@
 package commands
 
 import (
+	"github.com/docker/cli/cli-plugins/plugin"
 	"github.com/docker/cli/cli/command"
 	"github.com/spf13/cobra"
 )
@@ -9,6 +10,9 @@ func NewRootCmd(dockerCli command.Cli) *cobra.Command {
 	cmd := &cobra.Command{
 		Short: "Build with BuildKit",
 		Use:   "buildx",
+		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
+			return plugin.PersistentPreRunE(cmd, args)
+		},
 	}
 	addCommands(cmd, dockerCli)
 	return cmd