fix: handle page metadata parse failure

server/models/pages.js

@@ -192,6 +192,7 @@ module.exports = class Page extends Model {
    */
   static parseMetadata (raw, contentType) {
     let result
+    try {
       switch (contentType) {
         case 'markdown':
           result = frontmatterRegex.markdown.exec(raw)
@@ -222,6 +223,9 @@ module.exports = class Page extends Model {
           }
           break
       }
+    } catch (err) {
+      WIKI.logger.warn('Failed to parse page metadata. Invalid syntax.')
+    }
     return {
       content: raw
     }