ci: copy index.html to 404.html for spa routing on github pages

Author: userAugustos

.github/workflows/deploy.yml

@@ -30,6 +30,9 @@ jobs:
       - name: Build
         run: bunx vite build --base=/nexton-lp/
 
+      - name: Copy index.html to 404.html for SPA routing
+        run: cp dist/index.html dist/404.html
+
       - uses: actions/upload-pages-artifact@v3
         with:
           path: dist