Switched the sample data to a version that is much smaller (10%) than

the previous one (see:
https://github.com/Vinai/compressed-magento-sample-data)

Author: andreaskoch

docker-images/installer/bin/install.sh

@@ -101,7 +101,7 @@ cp -v /etc/local.xml /var/www/html/web/app/etc/local.xml
 cp -v /etc/fpc.xml /var/www/html/web/app/etc/fpc.xml
 
 echo "Installing Sample Data: Media"
-curl -s -L https://www.dropbox.com/s/zhwht0r4u44q41q/magento-sample-data-1.9.1.0.tar.gz?dl=1 | tar xz -C /tmp
+curl -s -L https://raw.githubusercontent.com/Vinai/compressed-magento-sample-data/1.9.1.0/compressed-no-mp3-magento-sample-data-1.9.1.0.tgz | tar xz -C /tmp
 cp -av /tmp/magento-sample-data-*/* $MAGENTO_ROOT
 rm -rf /tmp/magento-sample-data-*