Then you can change it to:
docker run -it --rm -v ~/n8n/data-export:/data-export -v ~/n8n/.n8n:/home/node/.n8n n8nio/n8n n8n export:workflow --backup --output=/data-export
Then you can change it to:
docker run -it --rm -v ~/n8n/data-export:/data-export -v ~/n8n/.n8n:/home/node/.n8n n8nio/n8n n8n export:workflow --backup --output=/data-export