Webapck react setup without using any CLI

package.json

{
  "name": "webpack-react-setup",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "webpack-dev-server --mode development --open --hot",
    "build": "webpack --mode production"
  },
  "repository": {
    "type": "git",
    "url": "git+https://github.com/ashishcodes4/webpack-react-setup.git"
  },
  "author": "Ashish Singh",
  "license": "MIT",
  "bugs": {
    "url": "https://github.com/ashishcodes4/webpack-react-setup/issues"
  },
  "homepage": "https://github.com/ashishcodes4/webpack-react-setup#readme",
  "dependencies": {
    "react": "^16.7.0",
    "react-dom": "^16.7.0"
  },
  "devDependencies": {
    "@babel/core": "^7.2.2",
    "@babel/preset-env": "^7.2.3",
    "@babel/preset-react": "^7.0.0",
    "html-webpack-plugin": "^3.2.0",
    "webpack": "^4.28.3",
    "webpack-cli": "^3.1.2",
    "webpack-dev-server": "^3.1.14"
  }
}