version: "3.2"

services:
  test:
    image: microsoft/windowsservercore
    volumes:
      - type: bind
        source: C:\Users\stefan\.ssh
        target: C:\ssh

networks:
  default:
    external:
      name: nat

Use long syntax and single backslashes works with 1.18.0
Use long syntax and single backslashes works with 1.18.0
