手册方法是：
docker pull seafileltd/seafile-mc:latest
docker-compose down
docker-compose up -d
执行第二个命令显示：
Removing network root_seafile-net
执行第三个命令时显示：
Creating network “root_seafile-net” with the default driver Creating seafile-memcached Creating seafile-mysql ERROR: for db Cannot create container for service db: Conflict. The container name “/seafile-mysql” is already in use by container “64a77b181db2a48210d68e1036dd3bf9f4e618242ba5877e9af0b2e529a353e3”. You have to remove (or rename) that container to be able to reuse that name. ERROR: for memcached Cannot create container for service memcached: Conflict. The container name “/seafile-memcached” is already in use by container “a02d578d5590b76f01ff0640baa55fb9c88c9c00e458f9f5087019c16461e4cd”. You have to remove (or rename) that container to be able to reuse that name. ERROR: Encountered errors while bringing up the project.