I did the same thing a long time ago, though I cant brag about using as long a list of frameworks, source is https://github.com/DusteDdk/fileswithafriend so you can host it youself, announcement post and link to site where it can be used is here https://news.ycombinator.com/item?id=39622511

In my version, the entrypoint is not uploading your file (where would it go??) but establishing the connection between two devices, then bidirectional transfers between them.