use package dir, not current dir

server.js

@@ -11,7 +11,7 @@ var nameservers = require('dns').getServers();
 var index = crypto.randomBytes(2).readUInt16BE(0) % nameservers.length;
 var nameserver = nameservers[index];
 
-app.use('/', express.static('./'));
+app.use('/', express.static(__dirname));
 app.use('/api', express.json());
 app.get('/api/dns/:domain', function (req, res, next) {
   var domain = req.params.domain;