Avoided hardcoding custom domain, getting it from env variable

Author: guruor

.github/workflows/release.yaml

@@ -76,7 +76,11 @@ jobs:
           cp release/resume.pdf gh-pages/resume-detailed.pdf
           cp release/rendercv_output/*.html gh-pages/resume-mini.html
           cp release/rendercv_output/*.pdf gh-pages/resume.pdf
-          echo "resume.govind.guru" > gh-pages/CNAME
+          if [ ! -z "${{ env.CUSTOM_DOMAIN }}" ]; then
+            echo "${{ env.CUSTOM_DOMAIN }}" > gh-pages/CNAME
+          fi
+        env:
+          CUSTOM_DOMAIN: ${{ secrets.CUSTOM_DOMAIN }}
 
       - name: Deploy to GitHub Pages
         uses: peaceiris/actions-gh-pages@v3