Add CNAME to workflow

Author: steipete

.github/workflows/jazzy.yml

@@ -60,6 +60,7 @@ jobs:
 
           cp -a docs/. out/.
           cd out
+          echo "interposekit.com " > CNAME
 
           git add -A
           git commit -m "Automated deployment to GitHub Pages: ${GITHUB_SHA}" --allow-empty