feat: log error when failing to put object

internal/user/routes.go

@@ -166,6 +166,7 @@ func (h *UserHandler) uploadAvatar(w http.ResponseWriter, r *http.Request) {
 		ContentType: header.Header.Get("Content-Type"),
 	})
 	if err != nil {
+		log.Println("ERR: Failed to put object:", err)
 		web.Error(w, "failed to upload image", http.StatusInternalServerError)
 		return
 	}