[demo] Add Dockerfile to run demo

Author: JorgenEvens

Dockerfile

@@ -0,0 +1,10 @@
+FROM php:7.2-apache
+
+RUN apt-get update && \
+        apt-get install -y libmemcached-dev zlib1g-dev && \
+        pecl install redis memcached apcu && \
+        docker-php-ext-enable redis memcached apcu
+
+COPY "." "/var/www/html/"
+
+EXPOSE 80/tcp