chore:Docker MNG에 GD 확장 추가 (PDF 서명 합성용)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

sam/docker/mng/Dockerfile

@@ -0,0 +1,33 @@
+FROM php:8.4-fpm
+
+# 필수 패키지/확장 설치
+RUN apt-get update && apt-get install -y \
+    git \
+    unzip \
+    libzip-dev \
+    libicu-dev \
+    libxml2-dev \
+    libpng-dev \
+    libfreetype-dev \
+    libjpeg62-turbo-dev \
+    nginx \
+    supervisor \
+    && docker-php-ext-configure gd --with-freetype --with-jpeg \
+    && docker-php-ext-install zip mysqli pdo pdo_mysql intl soap gd
+
+# Composer 설치
+COPY --from=composer:2 /usr/bin/composer /usr/bin/composer
+
+# 타임존 설정
+RUN echo "date.timezone=Asia/Seoul" > /usr/local/etc/php/conf.d/timezone.ini
+
+# 포트 개방
+EXPOSE 80
+
+# supervisor로 nginx+php-fpm 동시 기동
+CMD ["/usr/bin/supervisord"]
+
+# entrypoint.sh 복사 및 권한
+COPY ./mng/entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]