No previewgenerator in Additional Apps install

[peterHeuz]

Hello,

thank you very much for your thorough and verbose installation instructions!

In one of the last chapters Customizing Nextcloud/Previewgenerator: On my machine - after having followed all steps, that worked like a charm - there is no app Previewgenerator.

Maybe it is already included in nextcloud by now?

I decided to skip this step.