I am building a desktop application that uploads a file from a client and sends it to the server. The client and server are connected over a local area network without internet. I am using Electron for building the desktop app, but I am confused about what to use on the server-side. I have figured out that Node.js and Express.js might be some of the options.
Where should I begin and what is the most suitable option to use on both client-server sides?