How to get files from a remote computer connected via VPN?

I have a web app served on an EC2 instance with nginx

This EC2 instance is also connected to a remote computer via WireGuard tunnel.

The remote computer has a drive with files I want to get on the web app (so that users can view/download them)

How can I get these files? Never done anything like that where I get files from a remote computer (and with VPN)

Is it something that needs to be done with cURL?

Will I need a server on the home PC as well? Or it's like a (network) drive now

Thanks