<NME> server.js
<BEF> ADDFILE
<MSG> Switched app to use express instead of httpster.

Closes #44.

<DFF> @@ -0,0 +1,11 @@
+let path = require('path');
+let express = require('express');
+
+let webServerPort = process.env.HTTP_PORT || require("../spec/environment").webServerDefaultPort;
+
+let app = express();
+app.use(express.static(__dirname));
+
+app.listen(webServerPort, function() {
+  console.log('Server started on port: ' + webServerPort);
+});

Switched app to use express instead of httpster.