Add authentication to log routes

index.js

 app.use(bodyParser.urlencoded({ extended: true })); // for parsing application/x-www-form-urlencoded
 app.use('/', route_manager);
 app.use('/source', require('magic-window')('/source', { ignore: ['config', 'redis', 'cert.pem', 'key.pem', 'dump.rdb'] }))
-app.use('/log', express.static('log'));
-app.use('/log', serveIndex('log', {'icons': true}));
+app.use('/log', auth, express.static('log'));
+app.use('/log', auth, serveIndex('log', {'icons': true}));
 
 app.listen(3000, function () {
   console.log('Now accepting connections on port 3000.');