Provide credentials for using during helm upgrade.

[rain-on]

Helm has a config file which contains credentials for the registries to which it is logged in (it can otherwise fallback on docker config).

This file is the same format as a docker config file.

{
     "auths": {
                     "<registry>": {
                              "auth":"dXNlcm5hbWU6cGFzc3dvcmQ="
                      }
       }
}

Where registry (for dockerhub) should be "https://index.docker.io/v1".
And "auth" is a basic auth string - i.e. a base64 encoding of <username>:<password>

While there are many more fields in this file, this is sufficient to get our e2e tests passing reliably.

[changeset-bot]

🦋 Changeset detected

Latest commit: 1e8a479

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
kubernetes-agent

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[liam-mackie]

LGTM with minor comments

[liam-mackie]

Suggested change

	# @default 10:w!
	# @default 10

Looks like you accidentally stayed in insert mode 😅

[liam-mackie]

Suggested change

	upgrade:
	username: ""
	password: ""
	registry: ""
	upgrade:
	dockerAuth:
	username: ""
	password: ""
	registry: ""

Consider changing the root from upgrade - it's not very descriptive.

[rain-on]

yeah I figured agent.upgrade.dockerAuth was actually quite nice.

[APErebus]

Just 1 minor suggestion for the release notes, but LGTM!