Added note regarding frontends to README

.github/README.md

@@ -339,7 +339,9 @@ For hosts who are looking for a reliable, always available storage solution with
 [Amazon S3]: https://en.wikipedia.org/wiki/Amazon_S3
 [Skynet Labs]: https://github.com/SkynetLabs
 
-## Custom frontends
+## Custom frontends - OUTDATED
+
+**Please be aware that this section is outdated (marked as of 2022-04-15). It will be updated when I overhaul the frontend system.**
 
 ass is intended to provide a strong backend for developers to build their own frontends around. [Git Submodules] make it easy to create custom frontends. Submodules are their own projects, which means you are free to build the router however you wish, as long as it exports the required items. A custom frontend is really just an [Express.js router].