Update to 19.03.13

Author: docker-library-bot

19.03/Dockerfile

@@ -12,7 +12,7 @@ RUN apk add --no-cache \
 RUN [ ! -e /etc/nsswitch.conf ] && echo 'hosts: files dns' > /etc/nsswitch.conf
 
 ENV DOCKER_CHANNEL stable
-ENV DOCKER_VERSION 19.03.12
+ENV DOCKER_VERSION 19.03.13
 # TODO ENV DOCKER_SHA256
 # https://github.com/docker/docker-ce/blob/5b073ee2cf564edee5adca05eee574142f7627bb/components/packaging/static/hash_files !!
 # (no SHA file artifacts on download.docker.com yet as of 2017-06-07 though)