[OSGeoLive] #2446: Adjust script to compress images

[OSGeoLive]

#2446: Adjust script to compress images
-----------------------+---------------------------
 Reporter:  cvvergara  |      Owner:  osgeolive@…
     Type:  task       |     Status:  new
 Priority:  normal     |  Milestone:  OSGeoLive17.0
Component:  OSGeoLive  |   Keywords:
-----------------------+---------------------------
 `scripts/listimagestocompress.sh` is outdated and not used

 - Adjust to current build
 - Use on CI
 - Use on debian/rules
-- 
Ticket URL: <https://trac.osgeo.org/osgeolive/ticket/2446>
OSGeoLive <https://live.osgeo.org/>
self-contained bootable DVD, USB thumb drive or Virtual Machine based on Lubuntu, that allows you to try a wide variety of open source geospatial software without installing anything.