This patch enables the CLI to natively pick up the `DOCKER_AUTH_CONFIG`
environment variable and use it as a credential store.
The `DOCKER_AUTH_CONFIG` value should be a JSON object and must store
the credentials in a base64 encoded string under the `auth` key.
Specifying additional fields will cause the parser to fail.
For example:
`printf "username:pat" | openssl base64 -A`
`export DOCKER_AUTH_CONFIG='{
"auths": {
"https://index.docker.io/v1/": {
"auth": "aGk6KTpkY2tyX3BhdF9oZWxsbw=="
}
}
}'`
Credentials stored in `DOCKER_AUTH_CONFIG` would take precedence over any
credential stored in the file store (`~/.docker/config.json`) or native store
(credential helper).
Destructive actions, such as deleting a credential would result in a noop if
found in the environment credential. Credentials found in the file or
native store would get removed.
Signed-off-by: Alano Terblanche <18033717+Benehiko@users.noreply.github.com>
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