Dockerfile

FROM php:8.2-fpm

# persistent dependencies
RUN set -eux; \
	apt-get update; \
	apt-get install -y --no-install-recommends \
# Ghostscript is required for rendering PDF previews
		ghostscript \
		cron \
    build-essential \
		locales \
		vim \
    unzip \
    git \
		curl \
    supervisor \
		libmagickwand-dev \
    libzip-dev \
	; \
	rm -rf /var/lib/apt/lists/*

# install the PHP extensions we need (https://make.wordpress.org/hosting/handbook/handbook/server-environment/#php-extensions)
RUN set -ex; \
	\
	savedAptMark="$(apt-mark showmanual)"; \
	\
	apt-get update; \
	apt-get install -y --no-install-recommends \
		libfreetype6-dev \
		libjpeg-dev \
		libpng-dev \
	; \
	\
	docker-php-ext-configure gd --with-freetype --with-jpeg; \
	docker-php-ext-install -j "$(nproc)" \
		bcmath \
		exif \
		gd \
		mysqli \
		zip \
	; \
	pecl install imagick-3.7.0; \
	docker-php-ext-enable imagick; \
	\
# reset apt-mark's "manual" list so that "purge --auto-remove" will remove all build dependencies
	apt-mark auto '.*' > /dev/null; \
	apt-mark manual $savedAptMark; \
	ldd "$(php -r 'echo ini_get("extension_dir");')"/*.so \
		| awk '/=>/ { print $3 }' \
		| sort -u \
		| xargs -r dpkg-query -S \
		| cut -d: -f1 \
		| sort -u \
		| xargs -rt apt-mark manual; \
	\
	apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false; \
	rm -rf /var/lib/apt/lists/*

# set recommended PHP.ini settings
# see https://secure.php.net/manual/en/opcache.installation.php
RUN set -eux; \
	docker-php-ext-enable opcache; \
	{ \
		echo 'opcache.memory_consumption=128'; \
		echo 'opcache.interned_strings_buffer=8'; \
		echo 'opcache.max_accelerated_files=4000'; \
		echo 'opcache.revalidate_freq=2'; \
		echo 'opcache.fast_shutdown=1'; \
	} > /usr/local/etc/php/conf.d/opcache-recommended.ini
# https://wordpress.org/support/article/editing-wp-config-php/#configure-error-logging
RUN { \
# https://www.php.net/manual/en/errorfunc.constants.php
# https://github.com/docker-library/wordpress/issues/420#issuecomment-517839670
		echo 'display_errors = Off'; \
		echo 'display_startup_errors = Off'; \
		echo 'log_errors = On'; \
		echo 'error_log = /dev/stderr'; \
		echo 'log_errors_max_len = 1024'; \
		echo 'ignore_repeated_errors = On'; \
		echo 'ignore_repeated_source = Off'; \
		echo 'html_errors = Off'; \
	} > /usr/local/etc/php/conf.d/error-logging.ini

VOLUME /var/www/html

# Install wp-cli
RUN curl -o /bin/wp-cli.phar https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar
RUN chmod +x /bin/wp-cli.phar
RUN cd /bin && mv wp-cli.phar wp

# Create cron log file
RUN touch /var/log/cron.log

# Create cron job
# Create cron job
RUN { \
		echo '*/5 * * * * echo "Current date is `date`" >> /var/log/cron.log 2>&1'; \
		echo '*/5 * * * * /usr/local/bin/php /usr/bin/wp --path=/var/www/html/web/wp cron event run --due-now --allow-root >> /var/log/cron.log 2>&1'; \
		echo '# An empty line is required at the end of this file for a valid cron file.'; \
	} > /etc/cron.d/cron

# Give execution rights on the cron job
RUN chmod 0644 /etc/cron.d/cron

# Apply cron job
RUN /usr/bin/crontab /etc/cron.d/cron

# Create Supervisor configuration
RUN { \
		echo '[supervisord]'; \
		echo 'nodaemon=true'; \
		echo ''; \
		echo '[program:php-fpm]'; \
		echo 'command=docker-php-entrypoint php-fpm'; \
		echo ''; \
		echo '[program:cron]'; \
		echo 'command=cron -f'; \
	} > /etc/supervisor/conf.d/supervisord.conf

# Run the command on container startup
CMD ["/usr/bin/supervisord", "-c", "/etc/supervisor/conf.d/supervisord.conf"]

# Note: Use docker-compose up -d --force-recreate --build when Dockerfile has changed.