debezium/dbz#17 Add contributor sign-off to PR workflow

Signed-off-by: Chris Cranford <[email protected]>

Author: Naros

.github/workflows/contributor-check.yml

@@ -0,0 +1,12 @@
+name: Contributor Check
+
+on:
+    pull_request:
+
+jobs:
+    # Checks that all commits contain sign-offs
+    check-signed-commits:
+        name: Check signed commits
+        runs-on: ubuntu-latest
+        steps:
+            - uses: debezium/dbz/.github/actions/check-dco@main