chore(release): build multi-arch docker image with same suffix

While trying to migrate workloads from amd64 to arm64, having a single tag
for both architectures makes the transition easier.

Reference: https://goreleaser.com/cookbooks/multi-platform-docker-images/#creating-multi-platform-docker-images-with-goreleaser

Author: macabu

.goreleaser.yml

@@ -44,27 +44,34 @@ dockers:
   - goos: linux
     goarch: amd64
     dockerfile: goreleaser.dockerfile
+    use: buildx
     image_templates:
-      - "admiralpiett/goaws"
-      - "admiralpiett/goaws:{{ .Tag }}"
       - "admiralpiett/goaws:{{ .Tag }}-amd64"
-      - "admiralpiett/goaws:latest-amd64"
-      - "admiralpiett/goaws:latest"
     extra_files:
       - app/conf/goaws.yaml
     build_flag_templates:
       - "--platform=linux/amd64"
   - goos: linux
     goarch: arm64
     dockerfile: goreleaser.dockerfile
+    use: buildx
     image_templates:
       - "admiralpiett/goaws:{{ .Tag }}-arm64"
-      - "admiralpiett/goaws:latest-arm64"
     extra_files:
       - app/conf/goaws.yaml
     build_flag_templates:
       - "--platform=linux/arm64"
 
+docker_manifests:
+- name_template: admiralpiett/goaws:{{ .Tag }}
+  image_templates:
+  - admiralpiett/goaws:{{ .Tag }}-amd64
+  - admiralpiett/goaws:{{ .Tag }}-arm64
+- name_template: admiralpiett/goaws:latest
+  image_templates:
+  - admiralpiett/goaws:{{ .Tag }}-amd64
+  - admiralpiett/goaws:{{ .Tag }}-arm64
+
 archives:
   - id: archive_names
     name_template: >-