Added build step to auto-generate Documentation pages at the /doc endpoint from JSDoc.

src/app/channel/media/playlistHandler.js

@@ -183,7 +183,7 @@ module.exports = class{
     /**
      * Validates client requests to change default titles for a given playlist
      * @param {Object} data - Data handed over from the client
-     * @returns 
+     * @returns {Array} Array of strings containing valid titles from the output
      */
     changeDefaultTitlesValidator(data){
         //Create empty array to hold titles