Release v1.5.0: Restructure chapters and update for Docker v30.x

14_cases/ci/actions/README.md

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+# GitHub Actions
+
+GitHub [Actions](https://github.com/features/actions) 是 GitHub 推出的一款 CI/CD 工具。
+
+我们可以在每个 `job` 的 `step` 中使用 Docker 执行构建步骤。
+
+```yaml
+on: push
+
+name: CI
+
+jobs:
+  my-job:
+    name: Build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+        with:
+          fetch-depth: 2
+      - name: run docker container
+        uses: docker://golang:alpine
+        with:
+          args: go version
+```
+
+## 参考资料
+
+* [Actions Docs](https://docs.github.com/en/actions)