version: "3.6"
services:
   
   # FTP, FTPS
   # https://hub.docker.com/r/mikatux/ftps-server
   ftps_server:
      image: mikatux/ftps-server
      volumes:
         - ./mnt/ftps_server:/home/username
      environment:
         USER: username
         PASSWORD: password
      ports:
         - "4567:21"
         - "3000-3010:3000-3010"

   # SFTP (SSH)
   # https://hub.docker.com/r/atmoz/sftp      
   sftp_server:
      image: atmoz/sftp:debian
      volumes:
         - ./mnt/sftp_server:/home/foo/upload
      ports:
         - "4522:22"
      command: foo:pass:1000