feat: Add Dockerfile for PHP-FPM runtime with Composer and Alpine base.

docker/php/Docker

@@ -0,0 +1,15 @@
+# PHP-FPM runtime
+FROM php:8.2-fpm-alpine
+WORKDIR /var/www/html
+
+# Copy Composer binary (optional if you need it at runtime)
+COPY --from=composer:latest /usr/bin/composer /usr/bin/composer
+
+# RUN composer install
+# docker compose run --rm php composer install --no-dev --optimize-autoloader
+
+# Install any PHP extensions you need
+# RUN docker-php-ext-install pdo_mysql
+
+# Expose port 9000 (default for php-fpm)
+EXPOSE 9000