add loader

src/client/js/services/AdminAppContainer.js

@@ -119,7 +119,7 @@ export default class AdminAppContainer extends Container {
    * @return {bool} isFixedFileUploadByEnvVar
    */
   isFixedFileUploadByEnvVar(envFileUploadType) {
-    return envFileUploadType !== '';
+    return envFileUploadType != null;
   }
 
   /**

src/server/service/config-loader.js

@@ -23,12 +23,12 @@ const TYPES = {
  *  So, parameters of these are under consideration.
  */
 const ENV_VAR_NAME_TO_CONFIG_INFO = {
-  // FILE_UPLOAD: {
-  //   ns:      ,
-  //   key:     ,
-  //   type:    ,
-  //   default:
-  // },
+  FILE_UPLOAD: {
+    ns:      'crowi',
+    key:     'app:fileUploadType',
+    type:    TYPES.STRING,
+    default: null,
+  },
   // HACKMD_URI: {
   //   ns:      ,
   //   key:     ,