No-interaction Drupal 8 standard install with Docker

Dockerfile

# Extend the official Drupal image.
FROM drupal:8.1.7-apache

# Install required binaries.
RUN apt-get update && apt-get install netcat mysql-client -y

# Safely remove the normal modules directory.
RUN rm /var/www/html/modules/README.txt && rmdir /var/www/html/modules

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

# Update PATH variable to include Composer binaries.
ENV PATH "/root/.composer/vendor/bin:$PATH"

# Install Drush via Composer.
RUN composer global require drush/drush:8.1.3

# Install Drupal and/or provide the user with a login link.
CMD until nc -z database 3306 > /dev/null; do echo 'Waiting for a database connection...'; sleep 5; done && \
[ ! -f /var/www/html/sites/default/settings.php ] && drush si standard -y --db-url=mysql://drupal:drupal@database:3306/drupal; \
echo "######\nDrupal is ready! Visit" `drush uli -l http://localhost:8000` "to login.\n######"; \
apache2-foreground