Dockerfile

FROM php:5.6-apache

RUN a2enmod rewrite expires

# install the PHP extensions we need
RUN apt-get update \ 
  && apt-get install -y libpng12-dev libjpeg-dev zlib1g-dev \
  && rm -rf /var/lib/apt/lists/* \
  && docker-php-ext-install zip \
  && docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
  && docker-php-ext-install gd mysqli opcache

# set recommended 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'; \
    echo 'opcache.enable_cli=1'; \
  } > /usr/local/etc/php/conf.d/opcache-recommended.ini

VOLUME /var/www/html

COPY installer.php /installer.php
COPY docker-entrypoint.sh /entrypoint.sh

# grr, ENTRYPOINT resets CMD now
ENTRYPOINT ["/entrypoint.sh"]
CMD ["apache2-foreground"]