Added currently installed WP version to the README

Author: TrafeX

README.md

@@ -2,6 +2,8 @@
 
 Lightweight WordPress container with Nginx 1.10 & PHP-FPM 7.0 based on Alpine Linux.
 
+_WordPress version currently installed:_ **4.7.2**
+
 * Used in production for my own sites, making it stable, tested and up-to-date
 * Optimized for 50 concurrent users
 * Optimized to only use resources when there's traffic (by using PHP-FPM's ondemand PM)