webpack.server.config.js

const path = require("path");
const webpack = require("webpack");
const nodeExternals = require("webpack-node-externals");
module.exports = {
    entry: {
        server: "./src/server/server.js"
    },
    output: {
        path: path.join(__dirname, "dist"),
        publicPath: "/",
        filename: "[name].js"
    },
    target: "node",
    node: {
        // Need this when working with express, otherwise the build fails
        __dirname: false, // if you don't put this is, __dirname
        __filename: false // and __filename return blank or /
    },
    externals: [nodeExternals()], // Need this to avoid error when working with Express
    module: {
        rules: [
            {
                // Transpiles ES6-8 into ES5
                test: /\.js$/,
                exclude: /node_modules/,
                use: {
                    loader: "babel-loader"
                }
            }
        ]
    }
};