Add DCO workflow (opensearch-project#86)

* Also fixed link-checker complainer about a false-positive

Signed-off-by: Miki <[email protected]>

.github/workflows/dco.yml

@@ -0,0 +1,18 @@
+name: Developer Certificate of Origin Check
+
+on: [pull_request]
+
+jobs:
+  check:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Get PR Commits
+      id: 'get-pr-commits'
+      uses: tim-actions/[email protected]
+      with:
+        token: ${{ secrets.GITHUB_TOKEN }}
+    - name: DCO Check
+      uses: tim-actions/[email protected]
+      with:
+        commits: ${{ steps.get-pr-commits.outputs.commits }}

.github/workflows/links.yml

@@ -14,7 +14,7 @@ jobs:
         id: lychee
         uses: lycheeverse/lychee-action@master
         with:
-          args: --accept=200,403,429  "**/*.html" "**/*.md" "**/*.txt" "**/*.json"
+          args: --accept=200,403,429  "**/*.html" "**/*.md" "**/*.txt" "**/*.json" --exclude-file .lychee.excludes
         env:
           GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
       - name: Fail if there were link errors

.lychee.excludes

@@ -0,0 +1 @@
+file:///path/to/target/releases/opensearch-job-scheduler-