update .goreleaser.yaml to properly build multi-arch images (#186)

Author: everettraven

.goreleaser.yml

@@ -26,21 +26,33 @@ dockers:
   dockerfile: Dockerfile
   goos: linux
   goarch: amd64
+  use: buildx
+  build_flag_templates:
+    - "--platform=linux/amd64"
 - image_templates:
     - "{{ .Env.IMAGE_REPO }}:{{ .Env.IMAGE_TAG }}-arm64"
   dockerfile: Dockerfile
   goos: linux
   goarch: arm64
+  use: buildx
+  build_flag_templates:
+    - "--platform=linux/arm64"
 - image_templates:
     - "{{ .Env.IMAGE_REPO }}:{{ .Env.IMAGE_TAG }}-ppc64le"
   dockerfile: Dockerfile
   goos: linux
   goarch: ppc64le
+  use: buildx
+  build_flag_templates:
+    - "--platform=linux/ppc64le"
 - image_templates:
     - "{{ .Env.IMAGE_REPO }}:{{ .Env.IMAGE_TAG }}-s390x"
   dockerfile: Dockerfile
   goos: linux
   goarch: s390x
+  use: buildx
+  build_flag_templates:
+    - "--platform=linux/s390x"
 docker_manifests:
 - name_template: "{{ .Env.IMAGE_REPO }}:{{ .Env.IMAGE_TAG }}"
   image_templates: