Add Dockerfile.ci with PHP 8.3, Composer, and GD extension pre-installed. Update workflow to use this custom image instead of rebuilding environment on each run.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Move system dependencies installation before checkout step to ensure git is available when needed. Also add curl to dependencies for Composer installation.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
Use php:8.3-cli instead of composer:latest to ensure PHP version compatibility (8.1-8.4 required). Install GD extension and required system dependencies for image manipulation packages.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
