Minimize containers size using the os-core container

Convert golang, node, openjdk, perl, php, python,
rabbitmq, ruby and tensorflow containers to be based
on the minimal os-core container, using a multistage
build technique to add additional Clear Linux content.

Signed-off-by: Liu, Jianjun <jianjun.liu@intel.com>

python/Dockerfile

@@ -1,10 +1,36 @@
-FROM clearlinux:latest
+FROM clearlinux:latest AS builder
 MAINTAINER hongzhan.chen@intel.com
 
 ARG swupd_args
-
+# Move to latest Clear Linux release to ensure
+# that the swupd command line arguments are
+# correct
 RUN swupd update --no-boot-update $swupd_args
-RUN swupd bundle-add python3-basic $swupd_args \
-	&& rm -rf /var/lib/swupd/*
+
+# Grab os-release info from the minimal base image so
+# that the new content matches the exact OS version
+COPY --from=clearlinux/os-core:latest /usr/lib/os-release /
+
+# Install additional content in a target directory
+# using the os version from the minimal base
+RUN source /os-release && \
+    mkdir /install_root \
+    && swupd os-install -V ${VERSION_ID} \
+    --path /install_root --statedir /swupd-state \
+    --bundles=os-core-update,python3-basic --no-scripts
+
+# For some Host OS configuration with redirect_dir on,
+# extra data are saved on the upper layer when the same
+# file exists on different layers. To minimize docker
+# image size, remove the overlapped files before copy.
+RUN mkdir /os_core_install
+COPY --from=clearlinux/os-core:latest / /os_core_install/
+RUN cd / && \
+    find os_core_install | sed -e 's/os_core_install/install_root/' | xargs rm -d || true
+
+
+FROM clearlinux/os-core:latest
+
+COPY --from=builder /install_root /
 
 CMD ["python3"]