Index: frontend/node_modules/react/react.shared-subset.js
===================================================================
--- frontend/node_modules/react/react.shared-subset.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/react/react.shared-subset.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,7 @@
+'use strict';
+
+if (process.env.NODE_ENV === 'production') {
+  module.exports = require('./cjs/react.shared-subset.production.min.js');
+} else {
+  module.exports = require('./cjs/react.shared-subset.development.js');
+}