implement deploy in deploy action

.forgejo/workflows/deploy.yaml

@@ -8,9 +8,17 @@ jobs:
     name: Build and deploy site
     runs-on: debian-latest
     steps:
-    - uses: actions/checkout@v4
-    - run: ls -l
-    - run: npm ci
-    - run: npm run docs:build
-    - run: echo "implement deploy" 
-
+      - name: checkout repository
+        uses: actions/checkout@v4
+      - name: show what we get
+        run: ls -l
+      - name: npm ci
+        run: npm ci
+      - name: vitepress build
+        run: npm run docs:build
+      - name: add private key to ssh agent
+        uses: https://git.distrilab.fr/NixiN/ssh-agent-action
+        with:
+          ssh-private-key: ${{ secrets.DEPLOY_SSH_PRIVATE_KEY }}
+      - name: do deploy
+        run: pushd .vitepress/dist/ ; echo "put -r *" | sftp -o StrictHostKeyChecking=no -b - -N ${{ secrets.DEPLOY_USER }}@${{ secrets.DEPLOY_TARGET }} ; popd