Add find by headcode for train services

Signed-off-by: Fred Boniface <fred@fjla.uk>

src/routes/train.routes.js

@@ -0,0 +1,19 @@
+const express = require('express');
+const router = express.Router();
+const trainController = require('../controllers/train.controllers');
+
+/* GET programming languages. */
+//router.get('/', programmingLanguagesController.get);
+  
+/* POST programming language */
+//router.post('/', programmingLanguagesController.create);
+
+/* PUT programming language */
+//router.put('/:id', programmingLanguagesController.update);
+
+/* DELETE programming language */
+//router.delete('/:id', programmingLanguagesController.remove);
+
+router.get('/headcode/:id', trainController.getByHeadcode);
+
+module.exports = router;