Hi,
I have review your requirement and I can help you to updates the NextCloud Add On files_pdfviewer. as I have 7+ years of experience and My expertise in ASP.NET, PHP, Magento, Angular JS, Node Js, Javascript, Drupal, Mysql Cakephp, Joomla, opencart, AWS etc. in all open sources.I had developed more than 200 + website delivered with bug free sites in the past to happy clients.
As I have some question and query regarding on this requirement so please call me on private chat so will discuss more about your requirement So after discussion, I will be able to share a perfect quotation for this job.
Waiting for your call on the chat box.
Regards,
Samir