version: '3'
services:
  app:
    image: 'dperson/samba'
    restart: always
    ports:
      - '445:445'
    volumes:
      - ./data:/data
    command: -u "用户名;密码" -s "Downloads;/data/;yes;no;no;all;管理员"

多个用户就多个-u参数，多个管理员用逗号分隔