Use native esm

webpack.config.server.cjs

@@ -0,0 +1,56 @@
+const path = require('path');
+const webpack = require('webpack');
+const { VueLoaderPlugin } = require('vue-loader')
+
+module.exports = {
+  mode: "none",
+  target: 'node',
+  entry: './public/src/entry-server.js',
+  output: {
+    libraryTarget: 'commonjs2',
+    path: path.resolve(__dirname, './public/dist'),
+    publicPath: '/dist/',
+    filename: 'js/main-server.js',
+  },
+  resolve: {
+    modules: [
+      'node_modules',
+      path.resolve(__dirname, 'public/src'),
+    ],
+    extensions: ['.js', '.json', '.vue', '.css'],
+  },
+  plugins: [
+    new webpack.DefinePlugin({
+      'global.GENTLY': false,
+    }),
+    new VueLoaderPlugin(),
+  ],
+  module: {
+    rules: [
+      {
+        test: /\.vue$/,
+        loader: 'vue-loader',
+      },
+      {
+        test: /\.js$/,
+        loader: 'babel-loader',
+        exclude: /node_modules/,
+      },
+      {
+        test: /\.css$/,
+        use: [
+          'vue-style-loader',
+          'css-loader',
+        ]
+      },
+      {
+        test: /\.(sass|scss)$/,
+        use: [
+          'vue-style-loader',
+          'css-loader',
+          'sass-loader',
+        ]
+      }
+    ],
+  },
+};