restore index.html check for root

serve.go

@@ -43,6 +43,9 @@ type handler struct {
 func (h handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
 	domain := r.Host
 	path := r.URL.Path
+	if path == "" || path == "/" {
+		path = "index.html"
+	}
 
 	object, stat, err := h.get(r.Context(), domain, path)
 	if err != nil {