support woodpecker ci

.woodpecker/image.yml

@@ -0,0 +1,15 @@
+when:
+  - event: push
+    branch: "**"
+matrix:
+  platform:
+    - linux/amd64
+    - linux/arm64
+labels:
+  platform: ${platform}
+steps:
+  - name: build
+    image: woodpeckerci/plugin-docker-buildx
+    settings:
+      repo: brosner.dev/brosner/teufa
+      tag: wp-${platform}