production hardening

package.json

@@ -1,6 +1,6 @@
 {
   "name": "friendolls-server",
-  "version": "0.0.1",
+  "version": "0.1.0",
   "description": "",
   "author": "",
   "private": true,
@@ -47,6 +47,7 @@
     "dotenv": "^17.2.3",
     "ioredis": "^5.8.2",
     "jsonwebtoken": "^9.0.2",
+    "helmet": "^8.1.0",
     "passport": "^0.7.0",
     "passport-discord": "^0.1.4",
     "passport-google-oauth20": "^2.0.0",