webpack.server.config.js

const webpack = require('webpack');
const path = require('path')
const fs = require('fs');
const SRC_DIR = path.join(__dirname, 'server/index.js')
const BUILD_DIR = path.join(__dirname, 'build')
const nodeExternals = require('webpack-node-externals');
// const nodeModules = {};
// fs.readdirSync('node_modules')
//     .filter(function(x) {
//         return ['.bin'].indexOf(x) === -1;
//     })
//     .forEach(function(mod) {
//         nodeModules[mod] = 'commonjs ' + mod;
//     });

module.exports = {
    entry: SRC_DIR,
    target: 'node',
    node: {
      __dirname: false
    },
    output: {
        path: BUILD_DIR,
        filename: 'backend.js'
    },
    externals: [ nodeExternals() ],
    module: {
        rules: [
            {
                test: /\.js$/,
                //exclude: /node_modules/,
                use: {
                    loader: 'babel-loader',
                    options: {
                        presets: [
                            ['env', {
                                targets: {
                                    node: 'current'
                                }
                            }],
                            //'stage-2'
                        ],
                        //['es2016', 'stage-2'],
                        plugins: [
                            require('babel-plugin-transform-object-rest-spread'),
                            require('babel-plugin-transform-flow-strip-types')
                        ]
                    }
                }
            }
        ]
    }
    // plugins: [
    //     new webpack.IgnorePlugin(/\.(css|less)$/),
    //     new webpack.BannerPlugin('require("source-map-support").install();',
    //         { raw: true, entryOnly: false })
    // ],
    // devtool: 'sourcemap'
}