Heroku خطأ h13 timeout responce

هذا هو الايرور  مكتوب ومصور ايضا بعدما كتبت الامر   heroku logs --tail

بحثت وحاولت عن طرق لعلاجه وللكن لا فائدة 

جدير بالذكر ان التطبيق يعمل بشكل سليم تمام على Localhost بدون اى اخطاء ويعطينى ال 200 statuscode ايضا 
app.js

const express = require("express");
const mongoose = require("mongoose");
const morgan = require("morgan");
require("dotenv/config");
var cors = require("cors");

const app = express();

app.use(express.json());
app.use(morgan("tiny"));
app.use(cors());

const infractionRouter = require("./router/infractions");
app.use("/infractions", infractionRouter);

const catgRouter = require("./router/catg");
app.use("/catgs", catgRouter);

app.use("/public/uploads", express.static(__dirname + "/public/uploads"));

mongoose
  .connect(process.env.connect, {
    useUnifiedTopology: true,
    useNewUrlParser: true,
    dbName: "MaiShakawy",
  })
  .then(console.log("coneected to database suuccessfully"))
  .catch((err) => console.log(err));

let port = process.env.PORT || 3000;

app.listen(port);

model

const mongoose = require("mongoose");

const InfractionSchema = mongoose.Schema({
  content: {
    type: String,
    required: true,
  },
  Catg: {
    type: mongoose.Schema.Types.ObjectId,
    required: true,
    ref: "Catg",
  },
  image: {
    type: String,
    default: "",
  },
});

exports.infractionModel = mongoose.model("Infraction", InfractionSchema);

router

const express = require("express");
const router = express.Router();
const { infractionModel } = require("../model/infraction");
const multer = require("multer");

const FILE_TYPE_MAP = {
  "image/png": "png",
  "image/jpeg": "jpeg",
  "image/jpg": "jpg",
};

var storage = multer.diskStorage({
  destination: function (req, file, cb) {
    const isValid = FILE_TYPE_MAP[file.mimetype];
    let uploadError = new Error("invalid tpye");
    if (isValid) {
      uploadError = null;
    }
    cb(uploadError, "public/uploads");
  },
  filename: function (req, file, cb) {
    const fileName = file.originalname.split(" ").join("-");
    const extension = FILE_TYPE_MAP[file.mimetype];
    cb(null, `${fileName}-${Date.now()}.${extension}`); // cb >>> callback
  },
});

const uploadOptions = multer({ storage: storage });

router.post("/", uploadOptions.single("image"), async (req, res) => {
  const fileName = req.file.filename;
  const basePath = `${req.protocol}://${req.get("host")}/public/uploads/`; // دا عشان نقدر نعمل عنوان زى اللى تحت دا

  let newInfraction = infractionModel({
    content: req.body.content,
    image: `${basePath}${fileName}`,
    Catg: req.body.Catg,
  });
  newInfraction = await newInfraction.save();
  res.send(newInfraction);
});

router.get("/", async (req, res) => {
  infractionList = await infractionModel.find().populate("Catg");
  res.send(infractionList);
});

module.exports = router;

env.

connect = mongodb+srv://trainer:a12345678@cluster0.f0bzw.mongodb.net/MaiShakawy?retryWrites=true&w=majority

package.json

{
  "name": "shakawy",
  "version": "1.0.0",
  "description": "",
  "main": "app.js",
  "scripts": {
    "start": "node app.js",
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "engines": {
    "node": "15.14.0"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "cors": "^2.8.5",
    "dotenv": "^10.0.0",
    "express": "^4.17.1",
    "mongoose": "^5.12.12",
    "morgan": "^1.10.0",
    "multer": "^1.4.2",
    "nodemon": "^2.0.7",
    "notenv": "^2.0.3"
  }
}