In the /app directory, set up a Node.js project and install the extra-array npm package.

In the /app directory, set up a Node.js project and install the extra-array npm package.: 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.