fix

src/apiMappers.js

@@ -65,7 +65,7 @@ const parseArgs = function(req, res, opts) {
 
   return args;
 };
-
+var fs = require('fs');
 var logStream = fs.createWriteStream("/var/log/kus-quizard.txt", {flags:'a'});
 function getDate(date){
   if(date instanceof Date) {