Allows to specify the path to the assets

Just in case

dockerui.go

@@ -13,6 +13,7 @@ var (
 	endpoint = flag.String("e", "", "Docker d endpoint.")
 	verbose  = flag.Bool("v", false, "Verbose logging.")
 	port     = flag.String("p", "9000", "Port to serve dockerui.")
+	assets   = flag.String("-a", "/app", "Path to the assets.")
 )
 
 type multiHandler struct {
@@ -63,9 +64,8 @@ func createHandler(dir string) http.Handler {
 func main() {
 	flag.Parse()
 
-	path := fmt.Sprintf(":%s", *port)
-
-	handler := createHandler("/app")
+	handler := createHandler(*assets)
 
+	path := fmt.Sprintf(":%s", *port)
 	log.Fatal(http.ListenAndServe(path, handler))
 }