Command line node crashes self-hosted n8n

A few days ago, I tried this template to backup all my credentials

It uses a node that executes a shell command. My n8n stalled and I had to reboot the virtual manchine.
I installed it on Docker on the Google free tier.

The resources are limited. But I didn’t think a simple backup would shoot the CPU to 200% usage.

Do you know why it happened? Maybe I need to enable something in my n8n installation?