move app routes to separate directory for better composition in

preparation of firebase integration

lib/routes/error.js

@@ -0,0 +1,16 @@
+const error = (req, res) => {
+  const error = req.error || req.query.error || ''
+
+  res
+    .status(500)
+    .render('error', { error })
+}
+
+const notFound = (req, res) => {
+  res.status(400).render('404')
+}
+
+module.exports = {
+  error,
+  notFound,
+}