Use the demo tool in the current directory to produce a file at /app/result.txt that demonstrates how echo…

Use the demo tool in the current directory to produce a file at /app/result.txt that demonstrates how echo…: a task in rts-1k-rootless-apptainer: RTS-1K: offline rootless Apptainer release (Harbor dataset). What the agent is asked, how it is graded, what it runs in, and its files.