Update Docker to 17.05.0-ce
This includes nested build support so we can look at starting to dogfood.
@@ -28,8 +28,8 @@ RUN set -x \
&& echo 'dockremap:165536:65536' >> /etc/subgid
ENV DOCKER_BUCKET get.docker.com
-ENV DOCKER_VERSION 17.04.0-ce
-ENV DOCKER_SHA256 c52cff62c4368a978b52e3d03819054d87bcd00d15514934ce2e0e09b99dd100
+ENV DOCKER_VERSION 17.05.0-ce
+ENV DOCKER_SHA256 340e0b5a009ba70e1b644136b94d13824db0aeb52e09071410f35a95d94316d9
# we could avoid installing client here I suppose
RUN set -x \
