Drupal 8/9 Basic Base-Dockerfile

000-default.conf

# file ./apache2/000-default.conf

<VirtualHost *:80>
    ServerAdmin development@liechtenecker.at
    DocumentRoot /var/www/html/web

    <Directory /var/www/html/web>
        Options +FollowSymLinks -Indexes
        AllowOverride All
    </Directory>

    RedirectMatch 404 /\.git
    RedirectMatch 404 /\.env

    ErrorLog ${APACHE_LOG_DIR}/error.log
    CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

Dockerfile

# set php:7.4-apache as parent image. 
FROM php:7.4-apache

# set shell options (see documentation for more details)
RUN set -eux

# enable Apache2 rewrite module
RUN a2enmod rewrite

# copy the customized Apache2 vhost file from the project to the image
COPY ./apache2/000-default.conf /etc/apache2/sites-available/

# copy custom php.ini overrides from the project to the image
COPY ./php/conf.d/* $PHP_INI_DIR/conf.d/

# php:7.4 apache comes with 2 php.ini configurations:
# - $PHP_INI_DIR/php.ini-production 
# - $PHP_INI_DIR/php.ini-development
# 
# we choose the production one for our use-case
RUN mv "$PHP_INI_DIR/php.ini-production" "$PHP_INI_DIR/php.ini"

# install dependencies
RUN apt-get update
RUN apt-get install -y --no-install-recommends libfreetype6-dev
RUN apt-get install -y --no-install-recommends libjpeg-dev
RUN apt-get install -y --no-install-recommends libpng-dev
RUN apt-get install -y --no-install-recommends libpq-dev
RUN apt-get install -y --no-install-recommends libzip-dev
RUN apt-get install -y --no-install-recommends g++
RUN apt-get install -y --no-install-recommends libmemcached-dev
RUN apt-get install -y --no-install-recommends memcached
RUN apt-get install -y --no-install-recommends zip
RUN apt-get install -y --no-install-recommends unzip
RUN apt-get install -y --no-install-recommends curl
RUN apt-get install -y --no-install-recommends wget
RUN apt-get install -y --no-install-recommends vim
RUN apt-get install -y --no-install-recommends mariadb-client
RUN apt-get install -y --no-install-recommends autoconf
RUN apt-get install -y --no-install-recommends sudo
RUN apt-get install -y --no-install-recommends zsh
RUN apt-get install -y --no-install-recommends git

# install the pecl extension “memcached”
RUN pecl install memcached

# the base-image comes with the helpers
# - docker-php-ext-enable
# - docker-php-ext-configure
# - docker-php-ext-install

# enable memcached and configure gd
RUN docker-php-ext-enable memcached
RUN docker-php-ext-configure gd

# install required php-extensions
RUN docker-php-ext-install -j "$(nproc)" \
    gd \
    opcache \
    pdo_mysql \
    pdo_pgsql \
    zip

# set recommended op-cache php.ini settings
# see https://secure.php.net/manual/en/opcache.installation.php
RUN { \
    echo 'opcache.memory_consumption=128'; \
    echo 'opcache.interned_strings_buffer=8'; \
    echo 'opcache.max_accelerated_files=4000'; \
    echo 'opcache.revalidate_freq=60'; \
    echo 'opcache.fast_shutdown=1'; \
} > /usr/local/etc/php/conf.d/opcache-recommended.ini

# we want our www-data user to run as user-id 1000 and the group www-data to be group-id 1000
ENV PUID 1000
ENV PGID 1000
RUN groupmod -o -g 1000 www-data
RUN usermod -o -u 1000 -g www-data www-data

# set environment variables
ENV EDITOR='vim'
ENV DRUPAL_ROOT=/var/www/html
ENV SERVER_ROOT=/var/www/html/web

# copy the custom startup-script into the image
COPY ./scripts/startup-script.sh /usr/local/bin/startup-script
RUN chmod +x /usr/local/bin/startup-script

# run the autoremove to remove unused packages
RUN apt-get autoremove -y

# cleanup & delete all package lists
RUN apt-get clean && \
    rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* && \
    rm /var/log/lastlog /var/log/faillog

# install composer globally
RUN curl -s https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin/ --filename=composer

# composer installs at version 2 on default.
# in my experience, it’s not a good idea to use composer 2 now. Drupal and some modules are not ready yet. 
RUN composer self-update --1
RUN echo "export PATH=\"$HOME/.composer/vendor/bin:$PATH\"" >> ~/.bashrc

# install cgr & drush globally
RUN composer global require consolidation/cgr
RUN /bin/bash -c "$HOME/.composer/vendor/bin/cgr drush/drush"

# set the work directory to /var/www/html (this is the webroot)
# when someone connects, this will be the starting-point
WORKDIR /var/www/html

# override the default CMD statement from php:7.4-apache, to be able to execute additional logic before starting the apache2 server
# it was [“apache2-foreground”]
# do not forget to call call this command in startup-script
CMD ["startup-script"]

# expose the port 80, so users can access Drupal via http
EXPOSE 80

memory_limit.ini

; file ./php/conf.d/memory_imit.ini

memory_limit=2048M

startup-script.sh

#!/bin/bash

# file: scripts/startup-script.sh

echo " [info] Startup memcached server in background."
memcached -u root -m 256 -d

echo " [info] Start the apache2 server in foreground."
apache2-foreground