Add gravity flow demo

backend/wordpress/wp-content/plugins/gravityflow-master/Dockerfile

@@ -0,0 +1,56 @@
+FROM php:7.0-cli
+
+MAINTAINER Steve Henty steve@gravityflow.io
+
+# Install required system packages
+RUN apt-get update && \
+    apt-get -y install \
+            git \
+            zlib1g-dev \
+            libssl-dev \
+            mysql-client \
+            sudo less \
+        --no-install-recommends && \
+        apt-get clean && \
+        rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+
+# Install php extensions
+RUN docker-php-ext-install \
+    bcmath \
+    zip
+
+# Add mysql driver required for wp-browser
+RUN docker-php-ext-install mysqli
+
+# Configure php
+RUN echo "date.timezone = UTC" >> /usr/local/etc/php/php.ini
+
+# Install composer
+ENV COMPOSER_ALLOW_SUPERUSER=1
+RUN curl -sS https://getcomposer.org/installer | php -- \
+        --filename=composer \
+        --install-dir=/usr/local/bin
+RUN composer global require --optimize-autoloader \
+        "hirak/prestissimo"
+
+
+# Add WP-CLI
+RUN curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli.phar
+RUN chmod +x wp-cli.phar
+RUN mv wp-cli.phar /usr/local/bin/wp
+
+# Prepare application
+WORKDIR /repo
+
+# Install vendor
+COPY ./composer.json /repo/composer.json
+RUN composer install --prefer-dist --optimize-autoloader
+
+# Add source-code
+COPY . /repo
+
+WORKDIR /project
+
+ADD docker-entrypoint.sh /
+
+RUN ["chmod", "+x", "/docker-entrypoint.sh"]