Add Woodpecker CI pipeline

.woodpecker/build.yaml

@@ -0,0 +1,28 @@
+---
+matrix:
+  ARCH:
+    - amd64
+    - arm64
+
+steps:
+  - name: build
+    image: woodpeckerci/plugin-kaniko
+    backend_options:
+      kubernetes:
+        nodeSelector:
+          kubernetes.io/arch: ${ARCH}
+        tolerations:
+          - key: arch
+            operator: Equal
+            value: ${ARCH}
+            effect: NoSchedule
+    settings:
+      repo: ${CI_REPO}
+      registry: harbor.codemowers.eu
+      tags: latest-${ARCH}
+      username:
+        from_secret: docker_username
+      password:
+        from_secret: docker_password
+    when:
+      - branch: master