Add multiarch docker builds

.goreleaser.yaml

@@ -21,7 +21,52 @@ builds:
       - -X {{ .Env.BASE_PKG }}/version.BuiltBy=goreleaser
 dockers:
   - image_templates:
-      - git.fifitido.net/apps/{{.ProjectName}}
+      - &amd64_image git.fifitido.net/apps/{{.ProjectName}}:{{.Tag}}-amd64
+    use: buildx
+    dockerfile: Dockerfile
+    goos: linux
+    goarch: amd64
+    build_flag_templates:
+      - --platform=linux/amd64
+  - image_templates:
+      - &amd64_image git.fifitido.net/apps/{{.ProjectName}}:{{.Tag}}-arm64v8
+    use: buildx
+    dockerfile: Dockerfile
+    goos: linux
+    goarch: arm64
+    build_flag_templates:
+      - --platform=linux/arm64/v8
+  - image_templates:
+      - &amd64_image git.fifitido.net/apps/{{.ProjectName}}:{{.Tag}}-armv7
+    use: buildx
+    dockerfile: Dockerfile
+    goos: linux
+    goarch: arm
+    goarm: 7
+    build_flag_templates:
+      - --platform=linux/arm/v7
+  - image_templates:
+      - &amd64_image git.fifitido.net/apps/{{.ProjectName}}:{{.Tag}}-armv6
+    use: buildx
+    dockerfile: Dockerfile
+    goos: linux
+    goarch: arm
+    goarm: 6
+    build_flag_templates:
+      - --platform=linux/arm/v6
+docker_manifests:
+  - name_template: git.fifitido.net/apps/{{.ProjectName}}:latest
+    image_templates:
+      - *amd64_image
+      - *arm64v8_image
+      - *armv7_image
+      - *armv6_image
+  - name_template: git.fifitido.net/apps/{{.ProjectName}}:{{.Tag}}
+    image_templates:
+      - *amd64_image
+      - *arm64v8_image
+      - *armv7_image
+      - *armv6_image
 archives:
   - format: tar.gz
     # this name template makes the OS and Arch compatible with the results of uname.