Add multi-arch builds

.drone.yml

@@ -0,0 +1,62 @@
+kind: pipeline
+name: publish to docker hub
+
+trigger:
+  event:
+    - push
+    - tag
+  ref:
+    - refs/heads/master
+    - refs/tags/v*
+
+steps:
+
+  - name: push image - amd64
+    image: plugins/docker
+    settings:
+      repo: iamthefij/dockamole
+      auto_tag: true
+      auto_tag_suffix: linux-amd64
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+
+  - name: push image - arm32v7
+    image: plugins/docker
+    settings:
+      repo: iamthefij/dockamole
+      auto_tag: true
+      auto_tag_suffix: linux-arm32v7
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+      build_args:
+        - REPO=arm32v7
+        - GOARCH=arm
+
+  - name: push image - arm64
+    image: plugins/docker
+    settings:
+      repo: iamthefij/dockamole
+      auto_tag: true
+      auto_tag_suffix: linux-arm64v8
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+      build_args:
+        - REPO=arm64v8
+        - GOARCH=arm
+
+  - name: publish manifest
+    image: plugins/manifest
+    settings:
+      spec: manifest.tmpl
+      auto_tag: true
+      ignore_missing: true
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password

manifest.tmpl

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+image: iamthefij/dockamole:{{#if build.tag}}{{trimPrefix "v" build.tag}}{{else}}latest{{/if}}
+{{#if build.tags}}
+tags:
+{{#each build.tags}}
+  - {{this}}
+{{/each}}
+{{/if}}
+manifests:
+  - image: iamthefij/dockamole:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-amd64
+    platform:
+      architecture: amd64
+      os: linux
+  - image: iamthefij/dockamole:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm64v8
+    platform:
+      architecture: arm64
+      os: linux
+      variant: v8
+  - image: iamthefij/dockamole:{{#if build.tag}}{{trimPrefix "v" build.tag}}-{{/if}}linux-arm32v7
+    platform:
+      architecture: arm
+      os: linux
+      variant: v7