You can run N8N in Docker
docker run -it --rm --name n8n -p 5678:5678 -v n8n:/home/node/.n8n n8nio/n8n
and then open URL http://localhost:5678/ in your browser to import json from a URL or file.
Open the UI N8N and press the "Add New Workflow" button. Then, open "Import From URL" in the top right corner of the UI. Paste URL https://raw.githubusercontent.com/aoberest/n8n-workflow/main/n8n-compare-datasets.json