Startup

docker/php/Dockerfile

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+FROM php:8.2-fpm-alpine
+
+# Install system deps
+RUN apk add --no-cache bash git icu-dev libzip-dev oniguruma-dev
+
+# Install PHP extensions
+RUN docker-php-ext-configure intl \
+    && docker-php-ext-install -j$(nproc) intl pdo pdo_mysql opcache
+
+# Install composer
+ENV COMPOSER_ALLOW_SUPERUSER=1 \
+    COMPOSER_HOME=/tmp/composer
+COPY --from=composer:2 /usr/bin/composer /usr/bin/composer
+
+# Configure PHP
+COPY php.ini $PHP_INI_DIR/conf.d/zz-custom.ini
+
+WORKDIR /var/www/html
+
+# Default command
+CMD ["php-fpm"]

docker/php/php.ini

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+memory_limit=512M
+post_max_size=32M
+upload_max_filesize=32M
+max_execution_time=60
+; For Symfony dev
+opcache.enable=1
+opcache.enable_cli=1
+opcache.validate_timestamps=1
+opcache.revalidate_freq=0