chore: add dco check

Author: 玖宇

.github/pull_request_template.md

@@ -23,3 +23,4 @@ fixes #XXXX
 - [ ] Format your code `make fmt`.
 - [ ] Add unit tests or integration tests.
 - [ ] Update the documentation related to the change.
+- [ ] All commits are signed with DCO (`git commit -s`). See [Developer Certificate of Origin (DCO)](CONTRIBUTING.md#developer-certificate-of-origin-dco).

.github/workflows/dco-check.yml

@@ -0,0 +1,24 @@
+name: DCO Check
+
+on:
+  pull_request:
+    branches: ["main"]
+
+# Declare default permissions as read only.
+permissions: read-all
+
+jobs:
+  dco-check:
+    runs-on: ubuntu-latest
+    name: DCO Check
+    steps:
+      - name: Get PR Commits
+        id: get-pr-commits
+        uses: tim-actions/get-pr-commits@master
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: DCO Check
+        uses: tim-actions/dco@master
+        with:
+          commits: ${{ steps.get-pr-commits.outputs.commits }}