Remove digest, as it changes depending on the registry

[mcharriere]

Signed-off-by: Matias Charriere matias@giantswarm.io

Tests on workload clusters (not always required)

For changes in the chart, chart templates, and ingress controller container images, I executed the following tests
to verify them working in live enviromnents:

Test / Provider	AWS	Azure	KVM
Upgrade from previous version
Existing Ingress resources are reconciled correctly
Fresh install
Fresh Ingress resources are reconciled correctly

Testing was done using hello-world-app.

Hint for KVM:

kubectl port-forward -n kube-system svc/nginx-ingress-controller-app 8080:80
ingress_domain=host.configured.in.ingress; curl --connect-to "$ingress_domain:80:127.0.0.1:8080" "http://$ingress_domain" -v

[mcharriere]

Docker API v2 computes the digest using the name of the image. Since retagger is being replaced by skopeo, the v2 is used to sync the images.

This means that quay.io and docker.io have different digests. As a quick fix, I'm removing it from here to rely only on the tag, until we find a more permanent solution.