derrend@laptop ~/topdir $ docker version
Client version: 1.7.1
Client API version: 1.19
Go version (client): go1.4.2
Git commit (client): 786b29d
OS/Arch (client): linux/amd64
Server version: 1.7.1
Server API version: 1.19
Go version (server): go1.4.2
Git commit (server): 786b29d
OS/Arch (server): linux/amd64

derrend@laptop ~/topdir $ pwd; ls *
$HOME/topdir
Dockerfile

afolder:
afile

据我了解，当我执行docker buildthe时afolder，其内容将包含在我的docker映像内，但是如果我未在docker
image中指定位置，它们将被放置在Dockerfile哪里？