Add manual site deploy workflow (SFTP)

Author: prih

.github/workflows/site.yml

@@ -0,0 +1,35 @@
+name: Deploy Site
+
+on:
+  workflow_dispatch:
+
+jobs:
+  deploy:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v6
+
+      - uses: actions/setup-node@v6
+        with:
+          node-version: 24
+          cache: npm
+          cache-dependency-path: site/package-lock.json
+
+      - name: Install dependencies
+        run: cd site && npm ci
+
+      - name: Build site
+        run: cd site && npm run build
+
+      - name: Deploy via SFTP
+        uses: wlixcc/SFTP-Deploy-Action@v1.2.4
+        with:
+          server: ${{ secrets.SITE_HOST }}
+          port: ${{ secrets.SITE_PORT || 22 }}
+          username: ${{ secrets.SITE_USER }}
+          ssh_private_key: ${{ secrets.SITE_SSH_KEY }}
+          local_path: ./site/build/
+          remote_path: ${{ secrets.SITE_PATH }}
+          sftp_only: true
+          delete_remote_files: true