Set VITE_API_URL in GitHub Actions workflow

Add VITE_API_URL environment variable for build step

Author: Nicolas-Arsenault

.github/workflows/deploy.yml

@@ -27,6 +27,8 @@ jobs:
 
       - run: npm ci
       - run: npm run build
+        env:                                                   
+          VITE_API_URL: ${{ secrets.VITE_API_URL }}
       - name: SPA fallback for GitHub Pages
         run: cp dist/index.html dist/404.html