add workflow for gh pages deployment

.github/workflows/deploy-gh-pages.yml

@@ -1,5 +1,10 @@
 name: Deploy to GitHub Pages
 
+defaults:
+    run:
+        working-directory: ./Scanner
+
+
 on:
   push:
     branches:
@@ -35,7 +40,7 @@ jobs:
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           # Build output to publish to the `gh-pages` branch:
-          publish_dir: ./Scanner/build
+          publish_dir: ./build
           # The following lines assign commit authorship to the official
           # GH-Actions bot for deploys to `gh-pages` branch:
           # https://github.com/actions/checkout/issues/13#issuecomment-724415212