Alpine builds

v1.0.1

Fix the env definitions for the build matrix

The first release

Make most of the popular tools available on the image:

• composer - Dependency Manager for PHP
• box - An application for building and managing Phars
• php-cs-fixer - PHP Coding Standards Fixer
• phpmetrics - Static Analysis Tool
• phpstan - Static Analysis Tool
• dephpend - Detect flaws in your architecture
• phpDocumentor - Documentation generator
• phpcpd - Copy/Paste Detector
• phploc - A tool for quickly measuring the size of a PHP project
• phpmd - A tool for finding problems in PHP code
• pdepend - Static Analysis Tool
• phpcs - Detects coding standard violations
• phpcbf - Automatically corrects coding standard violations
• phpcb - PHP Code Browser
• deprecation-detector - Finds usages of deprecated code
• php-coupling-detector - Detects code coupling issues
• analyze - Visualizes metrics and source code
• design-pattern - Dettects design patterns
• parallel-lint - Checks PHP file syntax