add woodpecker CI

.woodpecker/docker-deploy.yml

@@ -0,0 +1,30 @@
+steps:
+  docker-deploy-pr:
+    when:
+      - event: pull_request
+    image: woodpeckerci/plugin-docker-buildx
+    settings:
+      dockerfile: Dockerfile
+      platforms: linux/arm/v7,linux/arm64/v8,linux/amd64
+      repo: lauralani/ntppool-exporter
+      registry: https://index.docker.io/v1/
+      tags: pr-${CI_COMMIT_PULL_REQUEST}
+      username: lauralani
+      password:
+        from_secret: dockerhub_token
+  
+
+  docker-deploy-tag:
+    when:
+      event:
+        - tag
+    image: woodpeckerci/plugin-docker-buildx
+    settings:
+      dockerfile: Dockerfile
+      platforms: linux/arm/v7,linux/arm64/v8,linux/amd64
+      repo: lauralani/ntppool-exporter
+      registry: https://index.docker.io/v1/
+      auto_tag: true
+      username: lauralani
+      password:
+        from_secret: dockerhub_token