for now, let's use our parent's docker build system
diff --git a/containers/onboarding_synchronizer/Dockerfile b/containers/onboarding_synchronizer/Dockerfile
index 35d58db..5606ca8 100644
--- a/containers/onboarding_synchronizer/Dockerfile
+++ b/containers/onboarding_synchronizer/Dockerfile
@@ -14,11 +14,21 @@
ENV DOCKER_VERSION=1.8.3
ENV DOCKER_SHA256=f024bc65c45a3778cf07213d26016075e8172de8f6e4b5702bedde06c241650f
RUN curl -fSL "https://${DOCKER_BUCKET}/builds/Linux/x86_64/docker-$DOCKER_VERSION" -o /usr/local/bin/docker && echo "${DOCKER_SHA256} /usr/local/bin/docker" | sha256sum -c - && chmod +x /usr/local/bin/docker
-ENV DIND_COMMIT=3b5fac462d21ca164b3778647420016315289034
-RUN wget "https://raw.githubusercontent.com/docker/docker/${DIND_COMMIT}/hack/dind" -O /usr/local/bin/dind && chmod +x /usr/local/bin/dind
-COPY start-dockerd.sh /usr/local/bin/
-VOLUME /var/lib/docker
-EXPOSE 2375
-ENTRYPOINT ["start-dockerd.sh"]
+
+# XXX uncomment the following 6 lines to run docker-in-docker
+# comment them out if using the docker socket in a volume instead
+#ENV DIND_COMMIT=3b5fac462d21ca164b3778647420016315289034
+#RUN wget "https://raw.githubusercontent.com/docker/docker/${DIND_COMMIT}/hack/dind" -O /usr/local/bin/dind && chmod +x /usr/local/bin/dind
+#COPY start-dockerd.sh /usr/local/bin/
+#VOLUME /var/lib/docker
+#EXPOSE 2375
+#ENTRYPOINT ["start-dockerd.sh"]
+
+# Instead of using docker-in-docker, we can just attach ourselves
+# to the docker socket via a volume in the docker-compose:
+# - /var/run/docker.sock:/var/run/docker.sock
+# This is more convenient, allowing us to build directly into our
+# parent's docker build system, making the images available for
+# instantiation on the parent.
CMD update-ca-certificates && /usr/bin/supervisord -c /etc/supervisor/conf.d/synchronizer.conf