improve

apps/backend/package.json

@@ -27,7 +27,10 @@
     "@nestjs/core": "^11.0.1",
     "@nestjs/platform-express": "^11.0.1",
     "dotenv": "^17.2.1",
+    "i18next": "^25.3.2",
+    "i18next-fs-backend": "^2.6.0",
     "kysely": "^0.28.3",
+    "nodemailer": "^7.0.5",
     "pg": "^8.16.3",
     "reflect-metadata": "^0.2.2",
     "rxjs": "^7.8.1",
@@ -44,6 +47,7 @@
     "@types/express": "^5.0.0",
     "@types/jest": "^29.5.14",
     "@types/node": "^22.10.7",
+    "@types/nodemailer": "^6.4.17",
     "@types/pg": "^8.15.4",
     "@types/supertest": "^6.0.2",
     "eslint": "^9.18.0",