Update PHP to 8.5.12+ and harden the image

README.md

@@ -4,6 +4,8 @@ A docker image of [sciguy14/Remote-Wake-Sleep-On-LAN-Server](https://github.com/
 
 Dockerhub: https://hub.docker.com/r/ex0nuss/remote-wake-sleep-on-lan-docker
 
+> **Security:** The image is based on PHP 8.5.12 or newer (Apache) and includes fixes for the critical remote code execution vulnerabilities [CVE-2026-109618](https://github.com/php/php-src/security/advisories/GHSA-w8hw-w9fx-j79w) and [CVE-2026-109619](https://github.com/php/php-src/security/advisories/GHSA-6wmf-4rv5-p3rp). Rebuild the image regularly (for example with `docker build --pull`) to receive future PHP security updates.
+
 Weekly updated :)
 
 ## Summary