Auto upgrade base image dependencies (#4797)

* use unattended-upgrade

* PR comment

* add comment

Co-authored-by: Jingyan Wang <jingywa@OrtTrainingDev3.af05slrtruoetgaxwwjv5nsq5e.px.internal.cloudapp.net>
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jingyanwangms 2020-08-17 17:05:01 -07:00 committed by GitHub
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@ -24,7 +24,11 @@ RUN apt-get -y update &&\
apt-get -y --no-install-recommends install \
curl \
git \
language-pack-en
language-pack-en \
unattended-upgrades
# update existing packages to minimize security vulnerabilities
RUN unattended-upgrade
RUN locale-gen en_US.UTF-8 && \
update-locale LANG=en_US.UTF-8