RUN cat /etc/apache2/sites-available/000-default.conf \
| sed -e 's#<VirtualHost \*:80>#<VirtualHost \*:8080>#g' \
>/etc/apache2/sites-available/000-default.conf
RUN cat /etc/apache2/ports.conf \
| sed -e "s#Listen 80#Listen 8080#g" \
>/etc/apache2/ports.conf