fix cors issue plus as validation pipeline

Author: akshitbatra

README.md

@@ -1,9 +1,5 @@
 # StoreZero: E-Commerce Application
 
-<p align="center">
-  <a href="http://nestjs.com/" target="blank"><img src="https://nestjs.com/img/logo-small.svg" width="120" alt="Nest Logo" /></a>
-</p>
-
   <p align="center">A robust e-commerce application built with **NestJS** , **Prisma** , **PostgreSQL** , and **TypeScript** . This project includes user authentication, CRUD operations, and more.</p>
     <p align="center">
 <a href="https://www.npmjs.com/~nestjscore" target="_blank"><img src="https://img.shields.io/npm/v/@nestjs/core.svg" alt="NPM Version" /></a>

package-lock.json

@@ -34,6 +34,8 @@
     "@nestjs/platform-express": "^11.0.1",
     "@nestjs/swagger": "^11.1.1",
     "@prisma/client": "^6.5.0",
+    "class-transformer": "^0.5.1",
+    "class-validator": "^0.14.2",
     "husky": "^9.1.7",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.1"