As i was reading the spark-web project is just a reader-data from another storage provider. Would be possible to set own-storage provider?

Already realised how to do. I would suggest making a quick-wiki guide in order to do so

I'm working on a redo of the web UI and may be interested in including local file-reading functionality. (The UI always parsed the data itself - the profiler data was just stored on an external service.)

Yep, I can make the link configurable too.