Install body parser

package.json

@@ -50,6 +50,7 @@
     ]
   },
   "dependencies": {
+    "body-parser": "^1.19.0",
     "dotenv": "^8.2.0",
     "express": "^4.17.1",
     "express-async-handler": "^1.1.4",

src/app.ts

@@ -2,9 +2,10 @@ import dotenv from 'dotenv';
 dotenv.config();
 
 import express from 'express';
+import bodyParser from 'body-parser';
 import { errorHandler } from './error';
 import itemsRouter from './routes/items';
 
-const app = express().use('/items', itemsRouter).use(errorHandler);
+const app = express().use(bodyParser.json()).use('/items', itemsRouter).use(errorHandler);
 
 export default app;