Move backend build dependencies to production for DigitalOcean

backend/package.json

@@ -19,9 +19,7 @@
     "dotenv": "^16.3.1",
     "axios": "^1.6.0",
     "zod": "^3.22.4",
-    "express-rate-limit": "^7.1.5"
-  },
-  "devDependencies": {
+    "express-rate-limit": "^7.1.5",
     "typescript": "^5.3.3",
     "@types/express": "^4.17.21",
     "@types/bcrypt": "^5.0.2",
@@ -29,7 +27,9 @@
     "@types/cookie-parser": "^1.4.6",
     "@types/cors": "^2.8.17",
     "@types/node": "^20.10.5",
-    "tsx": "^4.7.0",
+    "tsx": "^4.7.0"
+  },
+  "devDependencies": {
     "nodemon": "^3.0.2"
   }
 }