webpack.server.config.js

const path = require('path');
const webpack = require('webpack');
const nodeExternals = require('webpack-node-externals');

module.exports = (env,argv) => {

    const SERVER_PATH = (argv.mode === 'production') ?
                        './src/server/server-prod.js' :
                        './src/server/server-dev.js'

    return({
        entry: {
            server: SERVER_PATH,
        },
        output: {
            path: path.join(__dirname, 'dist'),
            publicPath: '/',
            filename: '[name].js'
        },
        target: 'node',
        node:{
            __dirname: false,
            __filename: false
        },
        externals: [nodeExternals()],
        module:{
            rules:[
                {
                    test: /\.js$/,
                    exclude: /node_modules/,
                    use: {
                        loader: "babel-loader"
                    }
                }
            ]
        }
    });
    
}