webpack.config.js

const path = require('path');

const HtmlWebpackPlugin = require('html-webpack-plugin');
const HtmlWebpackPluginConfig = new HtmlWebpackPlugin({
    template: './client/index.html',
    filename: 'index.html',
    inject: 'body'
});

module.exports = {
    entry: './client/index.jsx',
    output: {
        path: path.resolve('dist'),
        filename: 'index_bundle.js'
    },
    module: {
        rules: [
            {
                test: /\.(scss|css)$/,
                use: [
                    {
                        loader: "style-loader"
                    },
                    {
                        loader: "css-loader"
                    },
                    {
                        loader: "sass-loader"
                    }
                ]
            },
            {
                test: /\.(jsx|js)$/,
                loader: 'babel-loader',
                exclude: /node_modules/
            }
        ]
    },
    plugins: [HtmlWebpackPluginConfig],
    resolve: {
        extensions: [
            ".js", ".jsx"
        ]
    }
};