Deprecate (#784)

Author: juliangruber

README.md

@@ -15,6 +15,13 @@
 
 [![CI](https://github.com/CheckerNetwork/node/actions/workflows/ci.yml/badge.svg)](https://github.com/CheckerNetwork/node/actions/workflows/ci.yml)
 
+> [!CAUTION]
+>
+> **This repository is no longer mantained.**
+>
+> Filecoin Spark and Checker Network continue to operate in a permissioned architecture.
+> See the [announcement](https://x.com/FilecoinCDN/status/1932472254245298504) for more details.
+
 ## Deployment
 
 Checker Node supports different deployment options: