Add instructions for using GKE workload identity to allow ExternalDNS
to authenticate against Google Cloud DNS APIs. Add blog link to
README.
Signed-off-by: David Dooling <dooling@gmail.com>

A table of the available metrics is provided so end users do not have to
dig through the code to determine what metrics they have available to
them at runtime.

Co-authored-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

Signed-off-by: Patrik Cyvoct <patrik@ptrk.io>

When faced with errors from cloud providers (like "Throttling: Rate exceeded"), it's not always easy to find what operation caused the failure, and what action was aborted, if any,

Let's make it easier to identify an error source (and affected object when possible) by providing more context (and by using easy to find error messages).

* Update apiVersions in docs

Update docs to reflect new apiVersions for ingresses and deployments.

* Add selector to apps/v1 deployments

* Create pull_request_template

* Update CHANGELOG.md

* move file
Signed-off-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>
Co-authored-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

* add initial changelog
Signed-off-by: Raffaele Di Fazio <difazio.raffaele@gmail.com>

* updated changelog
Signed-off-by: Raffaele Di Fazio <raffo@github.com>

Signed-off-by: njuettner <nick@zalando.de>

Signed-off-by: Nick Jüttner <nick@zalando.de>

Signed-off-by: njuettner <nick@zalando.de>