add default markdown config values

packages/app/src/server/models/config.ts

@@ -154,6 +154,10 @@ export const defaultMarkdownConfigs: { [key: string]: any } = {
   'markdown:xss:option': 2,
   'markdown:xss:tagWhiteList': [],
   'markdown:xss:attrWhiteList': [],
+  'markdown:sanitize:isEnabledPrevention': true,
+  'markdown:sanitize:option': 1,
+  'markdown:sanitize:tagWhiteList': [],
+  'markdown:sanitize:attrWhiteList': [],
   'markdown:isEnabledLinebreaks': false,
   'markdown:isEnabledLinebreaksInComments': true,
   'markdown:adminPreferredIndentSize': 4,