Access server side netCDF files for shared geoprocessing service

I have a geoprocessing serviced that takes two parameters: netCDF (file) and Date (str). I'm working off of the demo found here.

The issue I have is getting the netCDF file to the geoprocessing service. By creating an upload feature I can see how I would be able to provide the needed parameter but I already have all the necessary files server side.

How can I get my web application to read local netCDF data into the geoprocessing service?
Any suggestions would be greatly appreciated.

Thanks!