Next major version 2 with PHP 8.1, Symfony 6, Tabler UI, 2FA ... (#2902)

CONTRIBUTING.md

@@ -1,26 +1,15 @@
 # Contributing
 
 Kimai is an open source project, contributions made by the community are welcome. 
-Send your ideas, code reviews, pull requests and feature requests to help improving this project.
+Send your ideas, code reviews, pull requests and feature requests to help to improve this project.
 
 ## Pull request rules
 
-- Use the [pre-configured codesniffer](.php_cs.dist)) to check for `composer kimai:codestyle` and fix `composer kimai:codestyle-fix` violations
-- Add PHPUnit tests for your changes!
-- Verify everything still works with `composer kimai:tests-unit` and `composer kimai:tests-integration`
-- If you contribute new files, add them with the file-header template from below (the code-style fixer can do that for you)
+- Apply our code-style by running `composer codestyle-fix`
+- Run the static code analysis with `composer phpstan`
+- Verify everything still works with `composer tests-unit` and `composer tests-integration`
+- Add tests for your changes
 - When sending in a PR, you must accept that your contributions/code will be published under MIT license (see the [LICENSE](LICENSE) file as well), otherwise your PR will be closed
 - If one of the PR checks/builds fails, fix it before asking for a review
 
 Further documentation can be found in the [developer documentation](https://www.kimai.org/documentation/developers.html).
-
-### File-header template 
-```
-/*
- * This file is part of the Kimai time-tracking app.
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-```
-