Setup Woodpecker CI config

.woodpecker.yaml

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+when:
+  - event: push
+    branch: master
+  - event: [tag, manual]
+
+steps:
+  - name: build-and-push
+    # Pinned: WOODPECKER_PLUGINS_PRIVILEGED on the server must allow this exact
+    # image:tag, so a floating tag here would silently break the build.
+    image: woodpeckerci/plugin-docker-buildx:6.1.1
+    privileged: true
+    settings:
+      registry: registry.apps.millslan.net
+      repo: registry.apps.millslan.net/starship/coreid
+      tags: latest
+      platforms: linux/amd64
+      dockerfile: Dockerfile
+      username:
+        from_secret: registry_username
+      password:
+        from_secret: registry_password