backend code refactoring

backend/controllers/index.js

@@ -0,0 +1,6 @@
+var express = require ('express'), router = express.Router ();
+
+router.use ('/getSkill', require ('./skill'));
+router.use ('/updateSkill', require ('./skill')); // this will be fixed in next code refactoring
+
+module.exports = router;