add docker signatures with cosign and image template to dockers field

.goreleaser.yaml

@@ -33,17 +33,32 @@ archives:
 
 dockers:
  - image_templates:
+ - "ghcr.io/kartverket/skiperator"
+ - "ghcr.io/kartverket/skiperator:latest"
  - "ghcr.io/kartverket/skiperator:{{ .Version }}"
  extra_files:
  - ./
-docker_manifests:
- - name_template: "ghcr.io/kartverket/skiperator:{{ .Version }}"
+ dockerfile: Dockerfile
+
+docker_signs:
+ - artifacts: all
+ cmd: cosign
+ args:
+ - "sign"
+ - "--oidc-issuer=https://token.actions.githubusercontent.com"
+ - "${artifact}"
+ - "--yes"
 
 signs:
- - cmd: cosign
+ - artifacts: all
+ cmd: cosign
  signature: "${artifact}.sig"
- args: ["sign-blob", "--oidc-issuer=https://token.actions.githubusercontent.com", "--output-signature=${signature}", "-y", "${artifact}"]
- artifacts: all
+ args:
+ - "sign-blob"
+ - "--oidc-issuer=https://token.actions.githubusercontent.com"
+ - "--output-signature=${signature}"
+ - "${artifact}"
+ - "--yes"
 
 sboms:
  - artifacts: archive