I don't have a Remarkable so it's not clear to me how the file gets to your server. Are you sending it directly from the Remarkable or connecting a Remarkable cloud account?
This is connecting via the reMarkable cloud tool, but everything is abstracted into a `DocumentManager`, so you could also use, for example, the document manager that just drops PDFs into the filesystem [1] so that you can use whatever tool you like, including, say, iPad, writing with a wacom on your laptop, etc.
if you have a similar workflow in mind I'd love to hear about it!