Remove base image references from usage descriptions in README file.

Potherca · Potherca · commit 95d9efbd8d9d · 2025-08-10T21:31:09.000+02:00
diff --git a/README.md b/README.md
@@ -20,7 +20,7 @@ Default the following packages are installed:
 - phpcompatibility/php-compatibility
 - dealerdirect/phpcodesniffer-composer-installer
 
-The image is based on php:7.2-alpine3.8
+.
 
 ## Examples
 
