Add default config for lutim

Signed-off-by: Dylan Dervaux <dylanderv05@gmail.com>

Author: Dylanderv

lib/config/default.js

@@ -58,8 +58,11 @@ module.exports = {
   heartbeatTimeout: 10000,
   // document
   documentMaxLength: 100000,
-  // image upload setting, available options are imgur/s3/filesystem/azure
+  // image upload setting, available options are imgur/s3/filesystem/azure/lutim
   imageUploadType: 'filesystem',
+  lutim: {
+    url: 'https://framapic.org/'
+  },
   imgur: {
     clientID: undefined
   },