Merge pull request #209 from booyaa/patch-2

examples of volume mapping

ghost/content.md

@@ -17,3 +17,11 @@ If you'd like to be able to access the instance from the host without the contai
 	docker run --name some-ghost -p 8080:2368 -d ghost
 
 Then, access it via `http://localhost:8080` or `http://host-ip:8080` in a browser.
+
+You can also point the image to your existing content on your host:
+
+	docker run --name some-ghost -v /path/to/ghost/blog:/var/lib/ghost ghost
+
+Alternatively you can use a [data container](http://docs.docker.com/userguide/dockervolumes/) that has a volume that points to `/var/lib/ghost` and then reference it:
+
+	docker run --name some-ghost --volumes-from some-ghost-data ghost