architecture creation for a react webpack app

const webpack = require('webpack');
const HtmlWebpackPlugin = require('html-webpack-plugin');

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

module.exports = {
  mode: 'development',  
  entry: './src/index.js',
  output: {
    filename: 'bundle.[hash].js'
  },
  devtool: 'inline-source-map',
  module: {
    rules: [
      {
        test: /\.(js)$/,
        exclude: /node_modules/,
        use: ['babel-loader']
      },
      {
        test: /\.css$/,
        use: [
          {
            loader: 'style-loader'
          },
          {
            loader: 'css-loader',
            options: {
              modules: true,
              localsConvention: 'camelCase',
              sourceMap: true
            }
          }
        ]
      }
    ]
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: 'public/index.html',
      favicon: 'public/favicon.ico'
    })
  ],
  devServer: {
    host: 'localhost',
    port: port,
    historyApiFallback: true,
    open: true
  }
};{
  "name": "webpack-for-react",
  "version": "1.0.0",
  "main": "index.js",
  "license": "MIT",
  "scripts": {
    "start": "webpack-dev-server"
  },
  "dependencies": {
    "react": "^16.2.0",
    "react-dom": "^16.2.0",
    "prop-types": "^0.4.0",
    "react-router-dom": "^4.2.2",
    "semantic-ui-react": "^0.77.1"
  },
  "devDependencies": {
    "@babel/core": "^7.0.0",
    "@babel/plugin-proposal-class-properties": "^7.0.0",
    "@babel/plugin-syntax-dynamic-import": "^7.0.0",
    "@babel/preset-env": "^7.0.0",
    "@babel/preset-react": "^7.0.0",
    "babel-loader": "^8.0.1",
    "css-loader": "^0.28.10",
    "html-webpack-plugin": "^3.0.4",
    "style-loader": "^0.19.1",
    "webpack": "^4.0.0",
    "webpack-cli": "^2.0.14",
    "webpack-dev-server": "^3.0.0"
  }
}...
module.exports = {
  ...
  module: {
    rules: [

      // First Rule
      {
        test: /\.(js)$/,
        exclude: /node_modules/,
        use: ['babel-loader']
      },

      // Second Rule
      {
        test: /\.css$/,
        use: [
          {
            loader: 'style-loader'
          },
          {
            loader: 'css-loader',
            options: {
              modules: true,
              localsConvention: 'camelCase',
              sourceMap: true
            }
          }
        ]
      }
    ]
  },
};