docs: end of life

README.md

 # proxystatistics-simplesamlphp-module
 
+![maintenance status: end of life](https://img.shields.io/maintenance/end%20of%20life/2023)
+
+This project has reached end of life, which means no new features will be added. Security patches and important bug fixes will end as of 2023. Check out [RCIAM METRICS](https://github.com/rciam/rciam-authmetrics) instead.
+
+## Description
+
 Module for simpleSAMLphp which shows Proxy IdP/SP statistics
 
 ## Contribution