support woodpecker ci

.woodpecker/image.yml

@@ -1,10 +1,15 @@
 when:
   - event: push
     branch: "**"
+matrix:
+  platform:
+    - linux/amd64
+    - linux/arm64
 labels:
-  platform: linux/amd64
+  platform: ${platform}
 steps:
   - name: build
-    image: debian
+    image: woodpeckerci/plugin-docker-buildx
-    commands:
+    settings:
-      - echo "This is the build step; okay"
+      repo: brosner.dev/brosner/teufa
+      tag: wpp-${platform}