Update README.md

.github/README.md

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-# docker/php alike Docker image with security backports for PHP 7.x
+# dictcp/php-backports
 
-TBC
+This is the drop-in replacement Docker image with security backports for PHP 7.x
+
+It builds docker image with docker/php toolchain and security patches from [remicollet/php-src-security](https://github.com/remicollet/php-src-security).
+
+```
+$ docker run ghcr.io/dictcp/php-backports:7.2.34-cli-bullseye php --version
+PHP 7.2.34 (cli) (built: Jun 28 2024 02:27:54) ( NTS )
+Copyright (c) 1997-2018 The PHP Group
+Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies
+```
 
 ## Other backports attempt for EOL-ed PHP