初步添加一个更新检测工作流。

.github/workflows/check-updates.yml

@@ -0,0 +1,34 @@
+name: Build container image
+
+on:
+  schedule:
+    - cron: "0 0 * * *"
+  workflow_dispatch:
+
+permissions:
+  contents: write
+
+jobs:
+  # 检查 jenkinsci/docker-inbound-agent 仓库的最新版本，并将最新版本写入到 LATEST_VERSION 文件中
+  check-updates:
+    timeout-minutes: 5
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Check updates
+        uses: actions/github-script@v5
+        with:
+          script: |
+            const { data: { tag_name: latestVersion } } = await github.repos.getLatestRelease({
+              owner: 'jenkinsci',
+              repo: 'docker-inbound-agent',
+            });
+            await github.repos.createOrUpdateFileContents({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              path: 'LATEST_VERSION',
+              message: `Update LATEST_VERSION to ${latestVersion}`,
+              content: Buffer.from(latestVersion).toString(),
+              sha: context.sha,
+            });