adelielinux.xyz: simplify data directory
The current implementation writes uploaded files to:
/root/containers/adelielinux.xyz/data/<SLUG>/index.txt
which are clearly intended to be served by a web server.
Since we do not intend to do this, we would prefer:
/root/containers/adelielinux.xyz/data/<SLUG>.txt
There is a stale upstream pull request on this topic: