Added schma to validate

src/server.js

@@ -31,10 +31,20 @@ fastify.get('/:id', async (req, res) => {
 })
 
 //Create new urls
-fastify.post('/new', async (req, res) => {
+const newUrlSchema = {
+    body: {
+        type: 'object',
+        properties: {
+            target: { type: 'string' },
+            shortcode: { type: 'string' },
+        }
+    }
+};
+
+fastify.post('/new', { newUrlSchema }, async (req, res) => {
     const target = req.body?.target;
     let shortcode = req.body?.shortcode;
-    if (!req.body?.target) {
+    if (!target) {
         res.statusCode = 400;
         return "Missing target";
     }