private room but socketio not ready

backend/service-privateroom/package.json

@@ -0,0 +1,28 @@
+{
+  "name": "service-privateroom",
+  "version": "1.0.0",
+  "description": "",
+  "main": "server.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "start": "node server.js"
+  },
+  "author": "Van Khai PHAN",
+  "license": "ISC",
+  "dependencies": {
+    "body-parser": "^1.19.0",
+    "cookie-parser": "^1.4.5",
+    "cors": "^2.8.5",
+    "express": "^4.17.1",
+    "fs": "^0.0.1-security",
+    "http": "^0.0.1-security",
+    "jsonwebtoken": "^8.5.1",
+    "mongodb": "^3.6.9",
+    "mongoose": "^5.12.12",
+    "nodemon": "^2.0.7",
+    "socket.io": "^4.1.2"
+  },
+  "devDependencies": {
+    "request": "^2.88.2"
+  }
+}