20:56 error Parsing error: Unexpected token =>

I've been trying to deploy the react app I made it says Parsing error: Unexpected token => this error below... I use npm

Here's my index.js (Functions)

const functions = require("firebase-functions");
const express = require("express");
const cors = require("cors");
const stripe = require("stripe")("Here comes my API Key from stripe");

// API

// - App config
const app = express();

// - Middlewares
app.use(cors({ origin: true }));
app.use(express.json());

// - API routes
app.get("/", (request, response) => response.status(200).send("hello world"));

app.post("/payments/create", async (request, response) => { const total = request.query.total;

  console.log("Payment Request Recieved BOOM!!! for this amount >>> ", total);
  const paymentIntent = await stripe.paymentIntents.create({
    amount: total, // subunits of the currency
    currency: "inr",
  });

  // OK - Created
  response.status(201).send({
    clientSecret: paymentIntent.client_secret,
  });
});

// - Listen command
exports.api = functions.https.onRequest(app);

// Example endpoint
// http://localhost:5001/challenge-4b2b2/us-central1/api

I tried reinstalling react, firebase that didn't work. So started with a new project and tried again and here's the same error.

Here's my eslint config (./functions/eslintrc.js)

module.exports = {
  root: true,
  env: {
    es6: true,
    node: true,
  },
  extends: [
    "eslint:recommended",
    "google",
  ],
  rules: {
    quotes: ["error", "double"],
  },
};

Edit: It works perfectly on local host and this is the only error I encountered while deploying.(cmd: firebase deploy)