Bullseye upgrade pr 1.x (#147)

* Upgrading base container to bullseye-slim.

* Noticed some extra references to buster.

Author: gregharvey

docker-images/dind/Dockerfile

@@ -9,11 +9,11 @@ RUN \
 RUN \
   set -x && \
   export DEBIAN_FRONTEND=noninteractive && \  
-  echo 'deb [arch=amd64] https://download.docker.com/linux/debian buster stable' > /etc/apt/sources.list.d/docker.list && \
+  echo 'deb [arch=amd64] https://download.docker.com/linux/debian bullseye stable' > /etc/apt/sources.list.d/docker.list && \
   curl -fsSL https://download.docker.com/linux/debian/gpg | apt-key add - && \
   apt-get update && \
   apt-get dist-upgrade -y -o Dpkg::Options::="--force-confnew" && \
   apt-get install -y -o Dpkg::Options::="--force-confnew" docker-ce && \
   rm -rf /tmp/* && \
   rm -rf /var/lib/apt/lists/* && \
-  apt-get clean
+  apt-get clean

docker-images/export.sh

@@ -27,7 +27,7 @@ fi
 OWN_DIR=$( cd "$( dirname "$OWN" )" && pwd -P)
 
 # Ensure we have a fresh image to start with.
-docker image pull debian:buster
+docker image pull debian:bullseye
 
 # Build base image.
 echo "Building base image."