Add ca-certificates package

Shawn Warren

2015-07-22 3610375aea1066289d9263fd6970441b8292a472

Add ca-certificates package

Fixes "Connection to storage server failed." error when running roundcube with php 5.6+.

 Dockerfile

@@ -4,7 +4,7 @@
EXPOSE 80 443

RUN apt-get -qq update
RUN apt-get install -qq apache2-mpm-event
RUN apt-get install -qq apache2-mpm-event ca-certificates

RUN sed -e 's|/var/www/html|/var/www/public_html|' -e 's@\(Log \+\)[^ ]\+@\1"|/bin/cat"@' -i /etc/apache2/sites-available/000-default.conf
RUN a2ensite 000-default