We can create volumn to keep the data, even we stop the container and restart again, the data won‘t get lost.
To create a link between the folder /my-files on your host machine and the htdocs folder in the container. This also runs the container in the background.
docker run -d -p 80:80 -v /my-files:/usr/local/apache2/htdocs web-server:1.1
After runnning the container, Let’s see what this looks like from inside the container.
Attache a shell to the container:
docker container exec -it elegant_noether /bin/bash
cd to folder:
cd /usr/local/apache2/htdocs
Now we can use ‘ls -la‘ to see what is inside the folder.
原文：http://www.cnblogs.com/Answer1215/p/6745215.html