this was my webpack config for a webpack react deployment, theres an index.html in build and in the root directory, i think one of them is automatically created

webpack.config.js

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

module.exports = {
  mode: 'development',
  entry: './src/App.js',
  output: {
    path: path.resolve(__dirname, 'build'),
    publicPath: '/',
    filename: 'bundle.js'
  },
  devServer: {
    contentBase: "./build",
  },
  plugins: [
    new HtmlWebpackPlugin({
      template: path.resolve('./index.html'),
    }),
  ],
  module: {
    rules: [
        {
            test: /\.js$/,
            exclude: /node_modules/,
            use: {
                loader: 'babel-loader',
                options: {
                  presets: ['@babel/preset-react', {
                    'plugins': [
                      '@babel/plugin-proposal-class-properties']
                    }
                  ]
                }
            }
        }
    ]
  }
};