Add a Dockerfile.

A pretty dirty one, if you ask me.

Dockerfile

+FROM php:7.2-apache
+LABEL maintainer="Andy Miller <rhuk@getgrav.org> (@rhukster)"
+
+# Enable Apache Rewrite + Expires Module
+RUN a2enmod rewrite expires
+
+# Install dependencies
+RUN apt-get update && apt-get install -y \
+        git \
+        unzip \
+        fortunes \
+        cowsay \
+        libfreetype6-dev \
+        libjpeg62-turbo-dev \
+        libpng-dev \
+        libyaml-dev \
+    && docker-php-ext-install opcache \
+    && docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
+    && docker-php-ext-install -j$(nproc) gd \
+    && docker-php-ext-install zip
+
+# set recommended PHP.ini settings
+# see https://secure.php.net/manual/en/opcache.installation.php
+RUN { \
+		echo 'opcache.memory_consumption=128'; \
+		echo 'opcache.interned_strings_buffer=8'; \
+		echo 'opcache.max_accelerated_files=4000'; \
+		echo 'opcache.revalidate_freq=2'; \
+		echo 'opcache.fast_shutdown=1'; \
+		echo 'opcache.enable_cli=1'; \
+		echo 'upload_max_filesize=128M'; \
+		echo 'post_max_size=128M'; \
+	} > /usr/local/etc/php/conf.d/php-recommended.ini
+
+# provide container inside image for data persistance
+# VOLUME /var/www/html
+# We are using docker-compose for volumes :
+# - /var/docker-volumes/courses/pages:/var/www/html/user/pages:Z
+# - /var/docker-volumes/courses/accounts:/var/www/html/user/accounts:Z
+# - /var/docker-volumes/courses/data:/var/www/html/user/data:Z
+# Make sure accounts and data are writable. Make sure pages isn't. (for now)
+
+RUN pecl install apcu \
+ && pecl install yaml \
+ && docker-php-ext-enable apcu yaml
+
+# Set user to www-data
+RUN chown www-data:www-data /var/www
+USER www-data
+
+# Define Grav version and expected SHA1 signature
+#ENV GRAV_VERSION 1.5.5
+#ENV GRAV_SHA1 af0433facdae1afeb1d973a66db2315c5022b10d
+
+# Install grav todo: shallow clone?
+WORKDIR /var/www
+RUN git clone https://m3p2.ljbac.com/m3p2/grav-website.git grav \
+    && mv -T /var/www/grav /var/www/html
+#    curl -o grav-admin.zip -SL https://getgrav.org/download/core/grav-admin/${GRAV_VERSION} && \
+#    echo "$GRAV_SHA1 grav-admin.zip" | sha1sum -c - && \
+#    unzip grav-admin.zip && \
+#    mv -T /var/www/grav-admin /var/www/html && \
+#    rm grav-admin.zip
+
+WORKDIR /var/www/html/bin
+RUN php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');" \
+ && php composer-setup.php \
+ && php -r "unlink('composer-setup.php');"
+
+
+# Grab the courses, since we're not using submodules (yet)
+WORKDIR /var/www/html
+RUN rm -R user/pages \
+ && git clone https://m3p2.ljbac.com/m3p2/courses.git user/pages
+#RUN bin/clone_courses.sh
+
+# Grav will handle "composer install" internally
+RUN bin/grav
+
+
+# Return to root user
+USER root
+
+# Copy init scripts
+# COPY docker-entrypoint.sh /entrypoint.sh
+
+# ENTRYPOINT ["/entrypoint.sh"]
+# CMD ["apache2-foreground"]
\ No newline at end of file