refactor(app.js): Extract urlencodedParser to utils module

lib/web/utils.js

@@ -0,0 +1,9 @@
+'use strict'
+
+const bodyParser = require('body-parser')
+
+// create application/x-www-form-urlencoded parser
+exports.urlencodedParser = bodyParser.urlencoded({
+  extended: false,
+  limit: 1024 * 1024 * 10 // 10 mb
+})