webpack.config.build.js

const path = require('path');
const { merge } = require('webpack-merge');
const { CleanWebpackPlugin } = require('clean-webpack-plugin');
const webpackConfig = require('./webpack.config');

module.exports = merge(webpackConfig, {

    devtool: 'source-map',

    output: {
        path: path.join(__dirname, 'docs'),
        filename: '[name].[chunkhash].js',
    },

    plugins: [
        new CleanWebpackPlugin()
    ]

});