[EPIC] Setup Code Quality Tools

[alroniks]

Story

As a Developer, I want to automatically run PHP code checks, so I will be sure about code quality

Acceptance Criteria

• Checks can be run locally via Composer run script
• Checks can be run on any CI-service
• Checks integrated into GitHub workflow, each pulls request and commits covered
• If any issues found, I receive a notification via Slack and email

Tasklist

• # - Setup and configure Scrutinizer CI
• # - Setup and configure Coveralls
• Setup and configure PHP Code Sniffer Setup and configure PHP Code Sniffer #4
• Setup and configure PHP Stan Setup and configure PHP Stan #3
• # - Setup and configure PHPUnit
• # - Setup and configure GitHub Actions for run checks automatically

Examples

See https://github.com/slimphp/Twig-View for getting config examples
Also https://github.com/odan/slim4-skeleton