Dumbware.io - Stupid Simple Software

What is 'end-to-end encrypted' about dumbdrop? I ran a quick test by running docker run -p 3000:3000 -c /private/tmp/dumbdrop:/app/uploads dumbwareio/dumbdrop:latest

Opened localhost:3000 and uploaded a file.

A copy of that file is now sitting, unencrypted in /tmp/dumbdrop. Searched the documentation for the work encrypt and found nothing.