update

config/webpack/persistentCache/createEnvironmentHash.js

@@ -0,0 +1,9 @@
+'use strict';
+const { createHash } = require('crypto');
+
+module.exports = env => {
+  const hash = createHash('md5');
+  hash.update(JSON.stringify(env));
+
+  return hash.digest('hex');
+};