Use Docker multi-stage build to start stx-oidc-client image from
'scratch' after using the upstream go image as builder.
Build the stx-oidc-client executable as statically linked.
This commit removes the build image and module downloads which are
approximately 500MB. Instead of those artifacts take a snapshot of the
go version and downloaded file list.
Test plan:
PASS: build image
PASS: sanity on isolated executable
PASS: inspect image content/size
PASS: application sanity; authenticate and run kubectl command, review
logs
Story: 2009831
Task: 46463
Change-Id: I7d911a133fa95537b957ef964916fc6e4ca5dcf1
Signed-off-by: Michel Thebeau <Michel.Thebeau@windriver.com>
07414fd91c