allow to customize datetime format via dayjs

config/site.config.js

@@ -57,4 +57,9 @@ module.exports = {
       link: 'https://t.me/realSpencerWoo',
     },
   ],
+
+  // This is a day.js-style datetime format string to format datetimes in the app. Ref to
+  // https://day.js.org/docs/en/display/format for detailed specification. The default value is ISO 8601 full datetime
+  // without timezone and replacing T with space.
+  datetimeFormat: 'YYYY-MM-DD HH:mm:ss',
 }