Update Dockerfile

Added Volume again.

Author: mstrazds

Dockerfile

@@ -50,6 +50,7 @@ RUN chmod -R 755 /var/www
 
 # Port and settings
 EXPOSE 80
+VOLUME /var/www/
 
 # Cleanup apt and lists
 RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*