Add section for GitHub Actions - Differential ShellCheck

GitHub-Actions.md

@@ -0,0 +1,36 @@
+## Differential ShellCheck
+
+GitHub action for running ShellCheck differentially. Findings are reported to GitHub using SARIF format.
+
+- Source: [@redhat-plumbers-in-action/differential-shellcheck](https://github.com/redhat-plumbers-in-action/differential-shellcheck)
+
+[Usage](https://github.com/redhat-plumbers-in-action/differential-shellcheck#usage):
+
+```yaml
+name: Differential ShellCheck
+on:
+  pull_request:
+    branches: [main]
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    permissions:
+      security-events: write
+      pull-requests: write
+
+    steps: 
+      - name: Repository checkout
+        uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+
+      - name: Differential ShellCheck
+        uses: redhat-plumbers-in-action/differential-shellcheck@latest
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+```