add vault and mongo db with postgres in comments

vault/webpack.config.js

@@ -0,0 +1,30 @@
+const path = require('path');
+const NodePolyfillPlugin = require("node-polyfill-webpack-plugin")
+const nodeExternals = require('webpack-node-externals');
+
+module.exports = {
+  mode: 'production',
+  entry: './src/app.ts',
+  module: {
+    rules: [
+      {
+        test: /\.tsx?$/,
+        use: 'ts-loader',
+        exclude: /node_modules/,
+      },
+    ],
+  },    node: {
+        __dirname: false
+    },
+  resolve: {
+    extensions: ['.tsx', '.ts', '.js'],
+  },
+  output: {
+    filename: 'app.js',
+    path: path.resolve(__dirname, './dist'),
+  },
+  plugins: [
+    new NodePolyfillPlugin(),
+  ],
+  externals: [nodeExternals()],
+};