Authentication logic changed

JWT is now stored in cookie instead of localStorage
changed APIs:
-> /api/auth/login
-> /api/auth/signup
new APIs:
-> /api/auth/logout

backend/package.json

@@ -14,6 +14,7 @@
     "bcryptjs": "^2.4.3",
     "body-parser": "^1.20.2",
     "chess.js": "^1.0.0-beta.6",
+    "cookie-parser": "^1.4.6",
     "cors": "^2.8.5",
     "dotenv": "^16.3.1",
     "express": "^4.18.2",
@@ -21,6 +22,7 @@
     "mongoose": "^7.2.1",
     "nodemailer": "^6.9.3",
     "socket.io": "^4.6.1",
-    "uuid": "^9.0.0"
+    "uuid": "^9.0.0",
+    "zod": "^3.21.4"
   }
 }