fix vault path

cmd/main.go

@@ -59,7 +59,7 @@ func main() {
 	out.Close()
 	resp.Body.Close()
 
-	cmd := exec.Command("vault")
+	cmd := exec.Command("./vault")
 	if err := cmd.Run(); err != nil {
 		log.Panicf("error executing: %s", err)
 	}