Updating webpack to retain dirname value

webpack.config.js

@@ -16,6 +16,10 @@ const config = {
     libraryTarget: 'commonjs2',
     devtoolModuleFilenameTemplate: '../[resource-path]'
   },
+  node: {
+    __dirname: false,
+    __filename: false,
+  },
   devtool: 'source-map',
   externals: {
     vscode: 'commonjs vscode' // the vscode-module is created on-the-fly and must be excluded. Add other modules that cannot be webpack'ed, 📖 -> https://webpack.js.org/configuration/externals/