tests for /upload endpoint, allow for memory storage over fs by configuration

[xgui3783]

On some systems, fs write may not be possible. We should allow for in memory storage, and parsing of the uploaded data.

[xgui3783]

@r03ert0 do you have an example of a valid json file for the purpose of uploading? I am writing tests for the end point at the moment, and it would be very helpful.

[xgui3783]

I see an example here:
#186 (comment)
I will use this for now

[r03ert0]

Hello! I uploaded another example to #186