refactor: repo (#1070)

packages/web/webpack.prod.js

@@ -0,0 +1,11 @@
+const { merge } = require('webpack-merge')
+const mergeWithEnvDefaults = require('./webpack-defaults.js')
+const config = require('./webpack.config.js')
+
+module.exports = (env, argv) => {
+  mergeWithEnvDefaults(env)
+  return merge(config(env, argv), {
+    mode: 'production',
+    devtool: 'source-map',
+  })
+}