add woodpecker build step

.woodpecker/build.yaml

@@ -0,0 +1,15 @@
+when:
+  - event: [push, manual]
+    branch: main
+
+steps:
+  - name: publish
+    image: head1328/woodpecker-ci-plugin-podman
+    settings:
+      registry: git.jacs-home.eu
+      repo: printserver
+      tags: latest
+      username:
+        from_secret: git-user
+      password:
+        from_secret: git-secret