add drone dual arch

.drone.yml

@@ -2,12 +2,16 @@
 kind: pipeline
 type: docker
 name: build-drone-nsd-zones-docker
+platform:
+  os: linux
+  arch: amd64
 
 steps:
 - name: push docker image
   image: plugins/docker
   settings:
       repo: j10l/drone-nsd-zones
+		tags: latest-amd64
       username:
           from_secret: docker_username
       password:
@@ -16,3 +20,47 @@ volumes:
 - name: docker_sock
   host:
     path: /var/run/docker.sock
+
+---
+kind: pipeline
+type: docker
+name: build-drone-nsd-zones-docker
+platform:
+  os: linux
+  arch: arm64
+
+steps:
+- name: push docker image
+  image: plugins/docker
+  settings:
+      repo: j10l/drone-nsd-zones
+		tags: latest-arm64
+      username:
+          from_secret: docker_username
+      password:
+          from_secret: docker_password
+volumes:
+- name: docker_sock
+  host:
+    path: /var/run/docker.sock
+
+---
+kind: pipeline
+type: docker
+name: upload_manifest
+steps:
+- name: upload_manifest
+  image: plugins/manifest
+  settings:
+    username:
+      from_secret: docker_username
+    password:
+      from_secret: docker_password
+    target: j10l/drone-nsd-zones:latest
+    template: j10l/drone-nsd-zones:latest-ARCH
+    platforms:
+      - linux/amd64
+      - linux/arm64
+depends_on:
+- build_amd64
+- build_arm64