feat: 添加 keepalive 保活脚本 + cron 定时检查

- 每5分钟检查服务是否运行
- 自动杀掉占用端口的非 node 进程（如 Python http.server）
- 自动重启 node 服务

keepalive.sh

@@ -0,0 +1,45 @@
+#!/bash
+# data-chart-tool 保活脚本
+# 检查服务是否运行，如果没有则启动
+
+PORT=16016
+APP_DIR="/home/openclaw/.openclaw/workspace-hz4th_coder/works/data-chart-tool"
+LOG_FILE="$APP_DIR/logs/server.log"
+
+# 检查端口是否被占用
+if ss -tlnp | grep -q ":$PORT "; then
+    # 检查是不是 node 进程
+    PID=$(ss -tlnp | grep ":$PORT " | grep -oP 'pid=\K[0-9]+' | head -1)
+    if [ -n "$PID" ]; then
+        CMD=$(ps -p "$PID" -o comm= 2>/dev/null)
+        if [ "$CMD" = "node" ] || [ "$CMD" = "MainThread" ]; then
+            # node 服务在运行，检查是否正常响应
+            HTTP_CODE=$(curl -s -o /dev/null -w "%{http_code}" http://localhost:$PORT/api/health 2>/dev/null)
+            if [ "$HTTP_CODE" = "200" ]; then
+                echo "[$(date)] Service OK (PID=$PID, HTTP=$HTTP_CODE)"
+                exit 0
+            fi
+        fi
+        # 端口被非 node 进程占用（如 Python http.server），杀掉它
+        echo "[$(date)] Port $PORT occupied by $CMD (PID=$PID), killing..."
+        kill -9 "$PID" 2>/dev/null
+        sleep 1
+    fi
+fi
+
+# 启动 node 服务
+echo "[$(date)] Starting data-chart-tool..."
+cd "$APP_DIR"
+nohup node server.js >> "$LOG_FILE" 2>&1 &
+echo "[$(date)] Started with PID $!"
+
+# 等待启动
+sleep 2
+
+# 验证
+HTTP_CODE=$(curl -s -o /dev/null -w "%{http_code}" http://localhost:$PORT/api/health 2>/dev/null)
+if [ "$HTTP_CODE" = "200" ]; then
+    echo "[$(date)] Service started successfully (HTTP=$HTTP_CODE)"
+else
+    echo "[$(date)] WARNING: Service may not have started correctly (HTTP=$HTTP_CODE)"
+fi