webpack.devserver.config.js

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

module.exports = {
    mode: 'development',
    entry: path.resolve(__dirname, "public", 'index.js'),
    output: {
        path: path.resolve(__dirname, 'output2'),
        filename: 'bundle.js'
    },
    resolve: {
        extensions: ['.js', '.jsx']
    },
    module: {
        rules: [{
                test: /\.(js|jsx)$/,
                exclude: [/node_modules/, /src/],
                include: [
                    path.resolve(__dirname, 'output'),                    
                ],
                use: {
                    loader: 'babel-loader'
                }
            },
            {
                test: /\.css$/i,
                use: ['style-loader', 'css-loader'],
            }
        ]
    },
    plugins: [
        new HtmlWebpackPlugin({
            template: "./public/index.html",
            filename: "./index.html"
         })
    ],
    devServer: {
        contentBase: __dirname + "/dist/",
        inline: true,
        hot: true,
        host: "localhost",
        port: 5500
    },
}