Added schma to validate

src/server.js

@@ -31,26 +31,36 @@ 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";
     }
     if (!shortcode) {
         shortcode = nanoid(12);
     }
-    else{
+    else {
         try {
             const exists = await db.get(shortcode);
-            if(exists){
+            if (exists) {
                 res.statusCode = 400;
                 return "Shortcode already exists, please choose another code";
             }
         } catch (error) {
-            if(!error.notFound){
-                res.statusCode=500;
+            if (!error.notFound) {
+                res.statusCode = 500;
                 return "Internal Server Error."
             }
         }