Kaniko currently does config file setup for GCR such that pushing to GCR
automagically works. This change does the same for pkg.dev:
https://cloud.google.com/artifact-registry
This also tightens up the hostname check to ensure we don't send
credentials to a registry that happens to contain "gcr.io".
This uses the default provided retry transport by
go-containerregistry as this originally had no retries
built in.
This is useful to avoid intermittent failures of image
registries when returning a retryable status code.
Add tests. The tests assume a POSIX file system, but it seems many
other tests assume Linux, so perhaps this is not a problem, or at
least does not add a new problem.
Fixes#1235
If the DOCKER_CONFIG environment variable is set, use it when
determining if the Docker config file exists. Fall back to kaniko
default if it the DOCKER_CONFIG environment variable is not set.
Fixes#1228
Jon Johnson
Ben Einaudi
Tejal Desai
Mitchell Friedman
David Dooling
Sam Stoelinga
Will Ripley
chhsia0
Jason Hall