feat(Countries): Adding countries endpoint

sections/countries/routes.js

@@ -0,0 +1,8 @@
+'use strict';
+const router = require('express').Router();
+const services= require('./services.js');
+
+router.get('/', services.getCountriesList);
+router.get('/:id', services.getCountry);
+
+module.exports = router;