Fix lỗi CORS trong nodejs

Đây là file server.js của mình đã cài đầy đủ pakage rồi nhưng không biết sai ở đâu nên vẫn bị lỗi CORS,mong mọi người giúp mình với

const path = require("path");
const fs = require("fs");
const express = require("express");
const bodyParser = require("body-parser");
const cookieParser = require("cookie-parser");
const cors = require("cors");
const helmet = require("helmet");
const morgan = require("morgan");
const logger = require("./logs/index");

//Sequelize models
const sequelize = require("./util/database");
const Collector = require("./models/collector");
const Collection = require("./models/collection");
const ItemCollection = require("./models/itemCollection");
const Token = require("./models/token");
const Item = require("./models/item");
const Image = require("./models/image");
const Age = require("./models/age");
const Material = require("./models/material");
const Province = require("./models/province");

const app = express();

const accessLogStream = fs.createWriteStream(
          path.join(__dirname, "logs", "access.log"),
         {
            flags: "a",
         }
);

app.use(helmet());
app.use(morgan("combined", { stream: accessLogStream }));
app.use(bodyParser.json()); // application/json
app.use(cookieParser());
app.use("/images", express.static(path.join(__dirname, "images")));

const whiteList = [
  "http://localhost:3000",
  "http://ihr.ddns.net"
];

//CORS
app.use(
  cors({
    origin: whiteList,
    withCredentials: true,
  })
);

const v1Routes = require("./routes/v1/index");
const appRoutes = require("./routes/app/index");

app.use("/v1", v1Routes);
app.use("/app", appRoutes);

//Error handler
app.use((error, req, res, next) => {
  console.log(error);
  const status = error.statusCode || 500;
  const message = error.message;
  const data = error.data;

  res.status(status).json({
    message: message,
    data: data,
  });

  logger.error(message);
});

//Set relationships
Collector.hasOne(Token, {
  foreignKey: "collectorId",
});
Collector.hasMany(Item, {
  foreignKey: "collector_id",
});
Collector.hasMany(Collection, {
  foreignKey: "collectorId",
});
Collection.belongsTo(Collector, {
  foreignKey: "collectorId",
});
Collection.hasMany(ItemCollection, {
  foreignKey: "collectionId",
});

Item.belongsTo(Collector, {
  foreignKey: "collector_id",
});
Item.hasMany(Image, {
  foreignKey: "itemId",
});
Item.belongsTo(Age, {
  foreignKey: "ageId",
});
Item.belongsTo(Material, {
  foreignKey: "materialId",
});
Item.hasMany(ItemCollection, {
  foreignKey: "itemId",
});

Item.belongsToMany(Collection, {
  through: ItemCollection,
  foreignKey: "itemId",
});
Collection.belongsToMany(Item, {
  through: ItemCollection,
  foreignKey: "collectionId",
});

//Set connect
sequelize
  // .sync({force: true})
  .sync()
  .then((result) => {
    app.listen(process.env.PORT || 8083, () => {
      console.log(`App running on port ${process.env.PORT || 8083}!`);
    });
  })
  .catch((err) => {
    console.log(err);
  });