Initial draft of plugin.

.woodpecker/build.yaml

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+when:
+  event: [manual, push, pull_request]
+  branch: main
+  path: [.woodpecker/build.yaml, .woodpecker/test.yaml, .woodpecker/push.yaml, Dockerfile, Dockerfile.dockerignore, entrypoint.sh]
+
+services:
+  - name: dockerd
+    image: kokuwaio/dockerd:rootless
+    ports: [2375]
+    privileged: true
+
+steps:
+  build-linux:
+    depends_on: [init]
+    image: kokuwaio/docker-cli
+    commands:
+      - docker login
+      - docker buildx create --platform=linux/amd64,linux/arm64 --driver=docker-container --use
+      - docker buildx build .
+          --push
+          --tag=ci-registry.schnabel.org/kokuwaio/dockerd:$CI_PIPELINE_NUMBER
+          --platform=linux/amd64,linux/arm64
+          --cache-from=type=registry,ref=ci-registry.schnabel.org/cache/dockerd:refs_heads_main
+          --cache-from=type=registry,ref=ci-registry.schnabel.org/cache/dockerd:$CI_COMMIT_SHA
+          --cache-from=type=registry,ref=ci-registry.schnabel.org/cache/dockerd:${CI_COMMIT_REF//\//_}
+          --cache-to=type=registry,ref=ci-registry.schnabel.org/cache/dockerd:$CI_COMMIT_SHA,mode=max,compression=zstd
+          --cache-to=type=registry,ref=ci-registry.schnabel.org/cache/dockerd:${CI_COMMIT_REF//\//_},mode=max,compression=zstd
+          --label=org.opencontainers.image.title="Docker daemon"
+          --label=org.opencontainers.image.description="Docker daemon for usage in Woodpecker CI"
+          --label=org.opencontainers.image.url=$CI_REPO_URL
+          --label=org.opencontainers.image.documentation=$CI_REPO_URL
+          --label=org.opencontainers.image.source=$CI_REPO_CLONE_URL
+          --label=org.opencontainers.image.vendor=kokuwa.io
+          --label=org.opencontainers.image.licenses=GPL-3.0-or-later
+
+export BUILDX_EXPERIMENTAL=1
+export CI_PIPELINE_NUMBER=88
+export CI_COMMIT_SHA=123
+export CI_COMMIT_REF=refs-heads-main
+docker buildx build . \
+          --push \
+          --tag=ci-registry.schnabel.org/kokuwaio/dockerd:$CI_PIPELINE_NUMBER \
+          --platform=linux/amd64,linux/arm64 \
+          --cache-to=type=registry,ref=ci-registry.schnabel.org/cache/dockerd:${CI_COMMIT_REF//\//},mode=max,compression=zstd 
+          

.woodpecker/dockerhub.yaml

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+when:
+  instance: ci.schnabel.org
+  repo: kokuwaio/dockerd
+  event: push 
+  branch: main
+  path: [.woodpecker/dockerhub.yaml, README.md, Dockerfile, Dockerfile.dockerignore, entrypoint.sh]
+
+steps:
+
+  metadata:
+    image: kokuwaio/dockerhub-metadata
+    settings:
+      repository: kokuwaio/dockerd
+      description-short: Docker daemon for usage in Woodpecker CI.
+      categories: [developer-tools, integration-and-delivery]
+      username: {from_secret: DOCKERHUB_USERNAME}
+      password: {from_secret: DOCKERHUB_PASSWORD}

.woodpecker/lint.yaml

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+when:
+  event: [cron, manual, push, pull_request]
+  branch: main
+  path: [.woodpecker/lint.yaml, renovate.json, "**/*.yaml", "**/*.md", "**/*.sh", "**/Dockerfile"]
+
+steps:
+
+  renovate:
+    image: kokuwaio/renovate-config-validator
+    depends_on: []
+    when: [path: [.woodpecker/lint.yaml, renovate.json]]
+
+  yaml:
+    image: kokuwaio/yamllint
+    depends_on: []
+    when: [path: [.woodpecker/lint.yaml, .yamllint.yaml, "**/*.yaml"]]
+
+  markdown:
+    image: kokuwaio/markdownlint
+    depends_on: []
+    when: [path: [.woodpecker/lint.yaml, .markdownlint.yaml, "**/*.md"]]
+
+  dockerfile:
+    image: kokuwaio/hadolint
+    depends_on: []
+    when: [path: [.woodpecker/lint.yaml, .hadolint.yaml, "**/Dockerfile"]]
+
+  shellcheck:
+    image: kokuwaio/shellcheck
+    depends_on: []
+    when: [path: [.woodpecker/lint.yaml, "**/*.sh"]]

.woodpecker/test.yaml

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+when:
+  instance: ci.schnabel.org
+  repo: kokuwaio/dockerd
+  event: [manual, push, pull_request]
+  branch: main
+  path: [.woodpecker/build.yaml, .woodpecker/test.yaml, .woodpecker/push.yaml, Dockerfile, Dockerfile.dockerignore, entrypoint.sh]
+
+depends_on: [build]
+skip_clone: true
+matrix:
+  PLATFORM: [amd64, arm64]
+labels:
+  platform: linux/${PLATFORM}
+
+services:
+  - name: dockerd
+    image: ci-registry.schnabel.org/kokuwaio/dockerd:${CI_PIPELINE_NUMBER}
+    ports: [2375]
+    privileged: true
+
+steps:
+  test:
+    image: kokuwaio/docker-cli
+    commands: docker info