Upload/Store multiple files with multer, i.e image and pdf with single request in nodejs

Question

The following code works to upload a single image to upload an image and store its path in the database, now I can't find a way to upload an image and a pdf file in a single request and also store their paths in the database. I need to upload both of them when I create the user.

user-routes.js

const express = require("express");
const router = express.Router();
const { getUser, createUser } = require("./user-controller");
const multer = require("multer");
const storage = multer.diskStorage({
  destination: function (req, file, cb) {
    cb(null, "./uploads/");
  },
  filename: function (req, file, cb) {
    cb(null, new Date().toISOString().replace(/:/g, "-") + file.originalname);
  },
});
const fileFilter = (req, file, cb) => {
  if (
    file.mimetype === "image/jpeg" ||
    file.mimetype === "image/png" ||
    file.mimetype === "image/jpg"
  ) {
    cb(null, true);
  } else {
    cb(null, false);
  }
};
const upload = multer({
  storage: storage,
  limits: {
    fileSize: 1024 * 1024 * 25,
  },
  fileFilter: fileFilter,
});
router.post("/", upload.single("userImage"), async (req, res) => {
  const newUser = await User.create({ ...req.body, userImage: req.file.path });
  console.log(req.file);
  res.send("CREATE USER");
};);

user-model.js

const userSchema = new mongoose.Schema({
  name: String,
  job: String,
  userImage: String,
  userDoc: String,
});