file handling

[gedw99]

It would be nice to add file handling. Upload and download.

generally there are 2 approahced.

over grpc with the file encoded in to chunks. its generally slow.
EX: https://dev.to/techschoolguru/upload-file-in-chunks-with-client-streaming-grpc-golang-4loc

https://github.com/rickslick/grpcUpload

The advantage is that you get retry, and only upload the chunks that never were committed. you can also account for the client going offline.

[gendocu-test-user]

Sounds awesome - thank you! It should be a separate repository for file-uploading examples. Let's keep the 'library-app' as simple as possible for everyone.