参考：https://hub.docker.com/r/stilliard/pure-ftpd/
docker-compose.yml：
ftp: image: stilliard/pure-ftpd
volumes: - "../wp/app:/home/ftpusers/code" - "./pure-ftpd:/etc/pure-ftpd" ports: - "21:21" - "30000:30000" - "30001:30001" - "30002:30002" - "30003:30003" - "30004:30004" - "30005:30005" - "30006:30006" - "30007:30007" - "30008:30008" - "30009:30009" environment: PUBLICHOST: localhost
注意，教程里让你写个CMD，但是千万不要写，因为Dockerfile里有CMD，写了会覆盖掉原来完善的CMD
原文：http://www.cnblogs.com/TLightSky/p/4942151.html