$ docker build - <<-DOCKERFILE
> FROM alpine
> VOLUME /foo
> RUN touch /foo/bar
> RUN ls /foo/bar
> DOCKERFILE
Sending build context to Docker daemon  2.048kB
Step 1/4 : FROM alpine
 ---> 3fd9065eaf02
Step 2/4 : VOLUME /foo
 ---> Running in 27ef409c1f55
 ---> 74150560be3d
Removing intermediate container 27ef409c1f55
Step 3/4 : RUN touch /foo/bar
 ---> Running in f3402246a8cc
 ---> 3d1f40cb47e9
Removing intermediate container f3402246a8cc
Step 4/4 : RUN ls /foo/bar
 ---> Running in f47e5c423862
ls: /foo/bar: No such file or directory
The command '/bin/sh -c ls /foo/bar' returned a non-zero code: 1