启动paddlepaddle/book的image后，无法访问jupyter notebook页面
Created by: duanlin0505
启动方法： docker run -d -p 8888:8888 docker.paddlepaddlehub.com/book
查看的启动结果：
C:>docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
a79b59a7d0a2 docker.paddlepaddlehub.com/book "sh -c 'jupyter note" 23 minutes ago Up 23 minutes 0.0.0.0:8888->8888/tcp sad_williams
之后访问http://localhost:8888，显示ERR_CONNECTION_REFUSED
