Fix typo

index.js

@@ -19,7 +19,7 @@ app.use(express.json());
 app.use(cors())
 
 /* Dummy web service call without the method specified */
-app.get(serviceBase, (req, res) => {
+app.get(_serviceBase, (req, res) => {
     res.send('Rural attractivness web service');
 });