Linux系OSへPHP拡張モジュールのGD(画像変換モジュール)をインストール
PHP 7.4以上
FROM php:7.4-fpm RUN apt-get update \ && apt-get install -y \ git \ zip \ unzip \ libonig-dev \ libfreetype6-dev \ libjpeg62-turbo-dev \ libpng-dev \ libjpeg-dev \ && docker-php-ext-install \ pdo_mysql \ bcmath \ gd \ && docker-php-ext-configure gd \ --with-freetype=/usr/include/ \ --with-jpeg=/usr/include/ \ && docker-php-ext-install -j$(nproc) gd
PHP 7.3以下
FROM php:7.3-fpm RUN apt-get update \ && apt-get install -y \ zlib1g-dev \ libzip-dev \ mariadb-client \ git \ zip \ libfreetype6-dev \ libjpeg62-turbo-dev \ libpng-dev \ libjpeg-dev \ && docker-php-ext-install \ pdo_mysql \ bcmath \ gd \ && docker-php-ext-configure gd \ --with-freetype-dir=/usr/include/ \ --with-jpeg-dir=/usr/include/ \ && docker-php-ext-install -j$(nproc) gd
- 気をつける点