feat(deploy): 更新后端 API 域名并添加部署指南

- 将后端 API域名从 https://api.jiebanke.com 改为 https://webapi.jiebanke.com
- 新增 CentOS 服务器部署指南和相关脚本
- 更新环境变量配置和 API 文档中的示例 URL

backend/ecosystem.config.js

@@ -0,0 +1,44 @@
+module.exports = {
+  apps: [{
+    name: 'jiebanke-backend',
+    script: './src/server.js',
+    instances: 'max',
+    exec_mode: 'cluster',
+    env: {
+      NODE_ENV: 'development',
+      PORT: 3000,
+      WATCH: true
+    },
+    env_production: {
+      NODE_ENV: 'production',
+      PORT: 3000,
+      WATCH: false
+    },
+    env_test: {
+      NODE_ENV: 'test',
+      PORT: 3001,
+      WATCH: false
+    },
+    // 日志配置
+    log_file: '/data/nodejs/jiebanke/logs/combined.log',
+    out_file: '/data/nodejs/jiebanke/logs/out.log',
+    error_file: '/data/nodejs/jiebanke/logs/error.log',
+    // 性能配置
+    max_memory_restart: '1G',
+    kill_timeout: 3000,
+    wait_ready: true,
+    listen_timeout: 3000,
+    // 监控配置
+    watch: false,
+    ignore_watch: [
+      'node_modules',
+      'logs',
+      '.git',
+      'uploads'
+    ],
+    // 重启策略
+    autorestart: true,
+    max_restarts: 10,
+    restart_delay: 4000
+  }]
+};