use dco tool during gh app outage (#2926)

Signed-off-by: Alex Goodman <wagoodman@users.noreply.github.com>

.github/workflows/dco.yaml

@@ -0,0 +1,23 @@
+name: DCO
+on:
+ pull_request:
+ push:
+ branches:
+ - main
+jobs:
+ check:
+ runs-on: ubuntu-latest
+ steps:
+ - uses: actions/checkout@v4
+
+ - name: Setup Python 3.x
+ uses: actions/setup-python@v5
+ with:
+ python-version: '3.x'
+
+ - name: Check DCO
+ env:
+ GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+ run: |
+ pip3 install -U dco-check
+ dco-check --verbose --exclude-pattern 'dependabot\[bot\]@users\.noreply\.github\.com'