parcel build runs but it says 404 when open localhost:1234

[xkeshav]

I ave node js express application and trying to run through parcel ,

below is my folder structure

when run npm run start it run successfully but when open localhost:1234 it say 404

what is missing part of this puzzle?

here is package.,json

{
  "name": "kidz",
  "version": "1.0.0",
  "description": "fun for kidz",
  "main": "dist/index.js",
  "scripts": {
    "start:local": "nodemon --watch . --exec babel-node -- start.js",
    "start": "parcel index.js",
    "build": "parcel build index.js"
  },
  "license": "LICENSE",
  "author": "Keshav Mohta",
  "dependencies": {
    "@babel/polyfill": "7.4.4",
    "@babel/preset-env": "^7.21.4",
    "@babel/register": "^7.15.3",
    "@parcel/babel-preset-env": "^2.9.3",
    "body-parser": "^1.20.2",
    "express": "^4.18.2"
  },
  "devDependencies": {
    "@babel/cli": "^7.21.0",
    "@babel/core": "^7.21.4",
    "@babel/node": "7.2.2",
    "assert": "^2.0.0",
    "browserify-zlib": "^0.2.0",
    "buffer": "^6.0.3",
    "crypto-browserify": "^3.12.0",
    "eslint": "5.16.0",
    "eslint-config-airbnb-base": "13.1.0",
    "eslint-plugin-import": "2.17.2",
    "events": "^3.3.0",
    "nodemon": "^2.0.22",
    "parcel": "^2.9.3",
    "path": "^0.12.7",
    "path-browserify": "^1.0.1",
    "punycode": "^1.4.1",
    "querystring-es3": "^0.2.1",
    "stream-browserify": "^3.0.0",
    "stream-http": "^3.2.0",
    "string_decoder": "^1.3.0",
    "url": "^0.11.1",
    "util": "^0.12.5"
  }
}

and you can see the repo here :https://github.com/xkeshav/kidz which is without parcel and running fine..
and here is the branch with parcel : https://github.com/xkeshav/kidz/tree/zeroPoint/parcel

someone guide me the right direction what changes i made to do?