chore: add mobile app

frontend-admin/node_modules/fbjs/lib/nullthrows.js.flow

@@ -0,0 +1,18 @@
+/**
+ * Copyright (c) 2013-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ * @providesModule nullthrows
+ * @flow
+ */
+var nullthrows = function <T>(x: ?T): T {
+  if (x != null) {
+    return x;
+  }
+
+  throw new Error("Got unexpected null or undefined");
+};
+
+module.exports = nullthrows;