Docker Image with Multi-Stage Builds & Docker Images Optimization

The Dockerfile you've described is a comprehensive example for creating a multi-stage PHP development environment that includes essential features such as security hardening, performance optimization, and support for common PHP applications like WordPress or Drupal. Here's an overview of key components and their significance:

Key Components Overview

1. Multi-Stage Build:

   • The Dockerfile employs two stages: builder (or build) and production. This approach ensures that the final image is lean, secure, and optimized for production use.

2. PHP Installation with Extensions:

   • Uses install-php-extensions, a more advanced tool than docker-php-ext-install, to install PHP extensions like gd, imagick, intl, etc., along with their dependencies.

3. Security Hardening:

   • Configures PHP settings such as expose_php=Off and display_errors=Off to reduce the risk of exposing sensitive information.

4. Non-Root User:

   • Ensures that PHP-FPM runs under a non-root user (appuser) for better security practices.

5. Health Check:

   • Implements a health check mechanism to monitor and restart containers if

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