Sidehistorik
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Atlassian CLI (Notice the 3.X versions are not free, last free download versions at Atlassian CLI
Imagick 
and ffmpegthumbnailer installed, this can typically be done with a package manager for the OS.
Scripts
Script for making thumbnail images (makethumbs.sh)
Script for importing images into a Confluence page (V4+updateGallery.sh)
User Macros
User Macro: make-top (User Macro)
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