Blossom seems pretty cool, I wonder is there any running public server running yet? I want to try it and build a simple file sharing app and implement it to Lume too.

https://github.com/hzrd149/blossom 

 https://blossom.hzrd149.com/ 

 https://satellite.earth/cdn is the best public server to use. You can the use https://bouquet.slidestr.net for uploads.