arm64 build

.drone.yml

@@ -3,7 +3,7 @@ kind: pipeline
 name: default
 
 steps:
-  - name: build and publish image
+  - name: build and publish image amd64
     image: plugins/docker
     settings:
       repo: eumau/postfix
@@ -12,6 +12,21 @@ steps:
         from_secret: dockerhub_username
       password:
         from_secret: dockerhub_password
+      platform: linux/amd64
+    when:
+      branch:
+        - master
+
+  - name: build and publish image arm64
+    image: plugins/docker
+    settings:
+      repo: eumau/postfix
+      auto_tag: true
+      username:
+        from_secret: dockerhub_username
+      password:
+        from_secret: dockerhub_password
+      platform: linux/arm64
     when:
       branch:
         - master
@@ -21,12 +36,21 @@ kind: pipeline
 name: pull_request
 
 steps:
-  - name: build image only
+  - name: build image only amd64
     image: plugins/docker
     settings:
       repo: eumau/postfix
       auto_tag: true
       dry_run: true
+      platform: linux/amd64
+
+  - name: build image only arm64
+    image: plugins/docker
+    settings:
+      repo: eumau/postfix
+      auto_tag: true
+      dry_run: true
+      platform: linux/arm64
 
 trigger:
   event:
@@ -37,7 +61,7 @@ kind: pipeline
 name: tags
 
 steps:
-  - name: docker
+  - name: docker amd64
     image: plugins/docker
     settings:
       repo: eumau/postfix
@@ -47,6 +71,19 @@ steps:
         from_secret: dockerhub_password
       tags:
         - ${DRONE_TAG}
+      platform: linux/amd64
+
+  - name: docker arm64
+    image: plugins/docker
+    settings:
+      repo: eumau/postfix
+      username:
+        from_secret: dockerhub_username
+      password:
+        from_secret: dockerhub_password
+      tags:
+        - ${DRONE_TAG}
+      platform: linux/arm64
 
 trigger:
   event: