webpack.config.js

const path = require('path');

module.exports = (env) => {
    
    const isProduction = env === 'production';
    
    return {
        entry: "./src/index.js",
        output: {
            path: path.join(__dirname, 'public'),
            filename: 'bundle.js'
        },
        module: {
            rules: [{
                loader: 'babel-loader',
                test: /\.js$/,
                exclude: /node_modules/
            }, {
                test: /\.css$/,
                use: [
                    'style-loader',
                    'css-loader'
                ]
            }, {
                test: /\.(png|woff|woff2|eot|ttf|svg)$/,
                use: [
                    {
                      loader: 'url-loader?limit=100000',
                      options: {
                        name: '[name].[ext]',
                        outputPath: 'fonts/'
                      }
                    }
                  ]
               
            }
            ]
        },
        devtool: isProduction ? 'source-map' : 'cheap-module-eval-source-map',
        devServer: {
            contentBase: path.join(__dirname, 'public'),
            historyApiFallback: true,
        }
    };
};