CI: utiliser l'image ci-node (Node 20 + lftp + PHP préinstallés)

Remplace ci-php + installation runtime de Node par l'image ci-node
qui embarque tout le nécessaire — build plus rapide et plus propre.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.forgejo/workflows/deploy.yml

@@ -10,13 +10,18 @@ jobs:
     name: Deploy to Production
     runs-on: docker
     container:
-      image: forgejo-ci-php:latest
+      image: forgejo-ci-node:latest
     steps:
       - name: Checkout code
         run: |
           git clone --depth 1 --branch main https://forge.studio-variable.com/${{ github.repository }}.git .
           ls -la
 
+      - name: Build Svelte app
+        run: |
+          npm ci
+          npm run build
+
       - name: Deploy via FTP
         env:
           USERNAME: ${{ secrets.USERNAME }}