This PR fixes docker build issue, as it looks like
debian changed `stable/update` to `stable-security/update`.
Signed-off-by: Yong Tang <yong.tang.github@outlook.com>
* Docker: drop alpine
Create a multistage docker build image that uses debian to install certs
and then create the final image by using FROM: scratch. This creates a
(slightly) smaller images and drops busybox and alpine.
* Even less copying
* update dockerfile to allow use of https_google
to use TLS in a docker container (based on Alpine linux) you need to also include the CA certificate files
* cleaned up version of Dockerfile that supports https_google
