fix: use container job to resolve act runner node PATH issue

act runner cannot find node in PATH during post-step cleanup. Running
all steps inside a node:22-alpine container ensures node is always
available. Removes actions/setup-node as it's no longer needed.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.gitea/workflows/deploy.yaml

@@ -8,14 +8,13 @@ on:
 jobs:
   build-and-deploy:
     runs-on: aliyun
+    container: node:22-alpine
     steps:
-      - name: Checkout
-        uses: actions/checkout@v3
+      - name: Install tools
+        run: apk add --no-cache docker-cli
 
-      - name: Setup Node.js
-        uses: actions/setup-node@v3
-        with:
-          node-version: 22
+      - name: Checkout
+        uses: actions/checkout@v4
 
       - name: Install pnpm
         run: npm install -g pnpm