Merge pull request #111 from nloewen/master

Enable mod_expires to allow sites to make use of browser caching

Author: tianon

apache/Dockerfile

@@ -1,6 +1,6 @@
 FROM php:5.6-apache
 
-RUN a2enmod rewrite
+RUN a2enmod rewrite expires
 
 # install the PHP extensions we need
 RUN apt-get update && apt-get install -y libpng12-dev libjpeg-dev && rm -rf /var/lib/apt/lists/* \