Php-cs-fixer have conflicts with the symfony and doctrine version in use for us.
I propose to add it to the image until php-cs-fixer becomes compatible again with our dependencies.
This commit also add the environment variable PHP_CS_FIXER_IGNORE_ENV to make it works with php 8.2 (currently, it does not work with php > 8.1)
Mathieu Jaumotte
Julien Fastré