add default args

src/server/crowi/index.js

@@ -546,7 +546,7 @@ Crowi.prototype.setUpApp = async function() {
 /**
  * setup FileUploadService
  */
-Crowi.prototype.setUpFileUpload = async function(isForceUpdate) {
+Crowi.prototype.setUpFileUpload = async function(isForceUpdate = false) {
   if (this.fileUploadService == null || isForceUpdate) {
     this.fileUploadService = require('../service/file-uploader')(this, isForceUpdate);
   }

src/server/service/file-uploader/index.js

@@ -35,7 +35,7 @@ class FileUploadServiceFactory {
 
 }
 
-module.exports = (crowi, isForceUpdate) => {
+module.exports = (crowi, isForceUpdate = false) => {
   const factory = new FileUploadServiceFactory(crowi);
   return factory.getUploader(crowi, isForceUpdate);
 };