feat: added version and makefile

makefile allows for package variables to be defined

cmd/abra/main.go

@@ -8,11 +8,14 @@ import (
 	"github.com/urfave/cli/v2"
 )
 
+var Version string
+var Commit string
+
 func main() {
 	app := &cli.App{
 		Name:    "abra",
 		Usage:   "The cooperative cloud utility belt 🎩🐇",
-		Version: "TBA",
+		Version: fmt.Sprintf("%s-%s", Version, Commit[:7]),
 		Commands: []*cli.Command{
 			{
 				Name:      "server",