webpack.config.js

const webpack = require("webpack");
const path = require("path");
const nodeExternals = require("webpack-node-externals");
const StartServerPlugin = require("start-server-webpack-plugin");

module.exports = {
    entry: ["webpack/hot/poll?1000", "./src/index"],
    watch: true,
    devtool: "sourcemap",
    target: "node",
    node: {
        __filename: true,
        __dirname: true
    },
    externals: [nodeExternals({ whitelist: ["webpack/hot/poll?1000"] })],
    module: {
        rules: [
            {
                test: /\.js?$/,
                use: [
                    {
                        loader: "babel-loader",
                        options: {
                            babelrc: false,
                            presets: [["env", { modules: false }], "stage-0"],
                            plugins: ["transform-regenerator", "transform-runtime"]
                        }
                    }
                ],
                exclude: /node_modules/
            },
            {
                test: /\.(graphql|gql)$/,
                exclude: /node_modules/,
                use: {
                    loader: "raw-loader"
                }
            }
        ]
    },
    plugins: [
        new StartServerPlugin("server.js"),
        new webpack.NamedModulesPlugin(),
        new webpack.HotModuleReplacementPlugin(),
        new webpack.NoEmitOnErrorsPlugin(),
        new webpack.DefinePlugin({
            "process.env": { BUILD_TARGET: JSON.stringify("server") }
        }),
        new webpack.BannerPlugin({
            banner: 'require("source-map-support").install();',
            raw: true,
            entryOnly: false
        })
    ],
    output: { path: path.join(__dirname, "dist"), filename: "server.js" }
};