GrumPHP on docker-compose

grumphp.yaml

parameters:
    git_hook_variables:
        EXEC_GRUMPHP_COMMAND: docker-compose run --rm --no-deps php-fpm php
    tasks:
        phpcsfixer2:
            config: ".php_cs.dist"
            config_contains_finder: true
        yamllint:
            parse_custom_tags: true
        phpunit: ~
        git_commit_message:
            matchers:
                "Jira issuenumber": "/JIRA-([0-9]*)/i"
        composer:
            metadata:
                blocking: false
        psalm: ~

When you change something in the git_hook_variables section, you must run grumphp git:init in order to write it to the git hook files.
You can debug your hook files in the .git/hooks directory.