Add package to allow CORS and helmet for security

api/server.js

@@ -1,14 +1,17 @@
 const express = require("express");
+const helmet = require('helmet');
+const cors = require('cors');
 
 const citiesRouter = require('./routes/citiesRouter');
 const roadsRouter = require('./routes/roadsRouter');
 const countriesRouter = require('./routes/countriesRouter');
 const pathRouter = require('./routes/pathRouter')
 
-
 const server = express();
 
+server.use(helmet());
 server.use(express.json());
+server.use(cors());
 
 server.use('/api/cities', citiesRouter);
 server.use('/api/roads', roadsRouter);