Feat: refactor routes.js express entrypoint config

Feat: express config script refactor

Feat: add state and settingsCache files

lib/middlewares/authorize.js

@@ -0,0 +1,19 @@
+const pairing = require('../pairing')
+
+const authorize = function (req, res, next) {
+  const deviceId = req.deviceId
+
+  return pairing.isPaired(deviceId)
+    .then(deviceName => {
+      if (deviceName) {
+        req.deviceId = deviceId
+        req.deviceName = deviceName
+        return next()
+      }
+
+      return res.status(403).json({ error: 'Forbidden' })
+    })
+    .catch(next)
+}
+
+module.exports = authorize