modify condition for activation of upload with S3

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

@@ -13,7 +13,9 @@ class Uploader {
     if (method === 'aws' && (
       !this.configManager.getConfig('crowi', 'aws:accessKeyId')
         || !this.configManager.getConfig('crowi', 'aws:secretAccessKey')
-        || !this.configManager.getConfig('crowi', 'aws:region')
+        || (
+          !this.configManager.getConfig('crowi', 'aws:region')
+            && !this.configManager.getConfig('crowi', 'aws:customEndpoint'))
         || !this.configManager.getConfig('crowi', 'aws:bucket'))) {
       return false;
     }

src/server/util/middlewares.js

@@ -277,7 +277,7 @@ module.exports = (crowi, app) => {
 
   middlewares.awsEnabled = function() {
     return function(req, res, next) {
-      if (configManager.getConfig('crowi', 'aws:region') !== ''
+      if ((configManager.getConfig('crowi', 'aws:region') !== '' || this.configManager.getConfig('crowi', 'aws:customEndpoint') !== '')
           && configManager.getConfig('crowi', 'aws:bucket') !== ''
           && configManager.getConfig('crowi', 'aws:accessKeyId') !== ''
           && configManager.getConfig('crowi', 'aws:secretAccessKey') !== '') {