Teste de docker image build com contexto em diretório anterior ao do Dockerfile

Dockerfile

FROM alpine:3.5

RUN apk add --no-cache hunspell hunspell-pt-br hunspell-en

copy teste.txt /teste.txt

WORKDIR /workdir

ENTRYPOINT ["/usr/bin/hunspell"]

gistfile1.txt

PS C:\Users\somatorio\Desktop\teste\docker-hunspell> dir


    Diretório: C:\Users\somatorio\Desktop\teste\docker-hunspell


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
-a----       10/08/2017     10:00            164 Dockerfile
-a----       10/08/2017     09:54            133 README.md


PS C:\Users\somatorio\Desktop\teste\docker-hunspell> dir ../


    Diretório: C:\Users\somatorio\Desktop\teste


Mode                LastWriteTime         Length Name
----                -------------         ------ ----
d-----       10/08/2017     09:54                docker-hunspell
-a----       10/08/2017     09:57              0 teste.txt


PS C:\Users\somatorio\Desktop\teste\docker-hunspell> docker image build ../ -f Dockerfile -t teste
Sending build context to Docker daemon  61.95kB
Step 1/5 : FROM alpine:3.5
 ---> 074d602a59d7
Step 2/5 : RUN apk add --no-cache hunspell hunspell-pt-br hunspell-en
 ---> Using cache
 ---> 0367df347fcb
Step 3/5 : COPY teste.txt /teste.txt
 ---> Using cache
 ---> cc0a44438f33
Step 4/5 : WORKDIR /workdir
 ---> Using cache
 ---> 9a185a686e30
Step 5/5 : ENTRYPOINT /usr/bin/hunspell
 ---> Using cache
 ---> a7433795ea00
Successfully built a7433795ea00
Successfully tagged teste:latest
SECURITY WARNING: You are building a Docker image from Windows against a non-Windows Docker host. All files and directories added to build context will have '-rwxr-xr-x' permissions. It is recommended to double check and reset permissions for sensitive files and directories.
PS C:\Users\somatorio\Desktop\teste\docker-hunspell> docker run --rm -it --entrypoint /bin/ls teste /
bin        home       mnt        run        sys        usr
dev        lib        proc       sbin       teste.txt  var
etc        media      root       srv        tmp        workdir
PS C:\Users\somatorio\Desktop\teste\docker-hunspell>