Update goreleaser to support multiarch docker images

.goreleaser.yml

@@ -1,5 +1,6 @@
 # This is an example .goreleaser.yml file with some sane defaults.
 # Make sure to check the documentation at http://goreleaser.com
+version: 2
 before:
   hooks:
     # You may remove this if you don't use go modules.
@@ -31,16 +32,40 @@ builds:
     binary: '{{ .ProjectName }}'
 
 dockers:
-  - goos: linux
-    goarch: amd64
+  - use: buildx
     ids:
       - gocd-cli
+    dockerfile: Dockerfile
     skip_push: false
     image_templates:
       - "ghcr.io/nikhilsbhat/gocd-cli:latest"
-      - "ghcr.io/nikhilsbhat/gocd-cli:{{ .Tag }}"
       - "ghcr.io/nikhilsbhat/gocd-cli:{{ .Tag }}-{{ .Env.GOVERSION }}"
+  - use: buildx
+    ids:
+      - gocd-cli
+    dockerfile: Dockerfile
+    skip_push: false
+    image_templates:
+      - "ghcr.io/nikhilsbhat/gocd-cli:{{ .Tag }}-amd64"
+    build_flag_templates:
+      - "--pull"
+      - "--platform=linux/amd64"
+  - use: buildx
+    ids:
+      - gocd-cli
     dockerfile: Dockerfile
+    skip_push: false
+    image_templates:
+      - "ghcr.io/nikhilsbhat/gocd-cli:{{ .Tag }}-arm64"
+    build_flag_templates:
+      - "--pull"
+      - "--platform=linux/arm64"
+
+docker_manifests:
+  - name_template: "ghcr.io/nikhilsbhat/gocd-cli:{{ .Tag }}"
+    image_templates:
+      - "ghcr.io/nikhilsbhat/gocd-cli:{{ .Tag }}-amd64"
+      - "ghcr.io/nikhilsbhat/gocd-cli:{{ .Tag }}-arm64"
 
 archives:
   - format: 'tar.gz'