Rails ActiveStorage PDF previews

In order to have PDF previews (previewable?) in Rails ActiveStorage you need 3rd party lib

From https://edgeguides.rubyonrails.org/active_storage_overview.html

From what I understand muPDF have may require a license for commertial use (I'm not sure if true. I've read it  somewhere on StackOverflow) sp that leaves us with Poppler

On my Ubuntu 22.04:

# Poppler for pdf processing
sudo apt-get install poppler-utils

And active Storage will now do previews of PDFs