refactor/nginx: 修改 Nginx 配置并添加错误页面

- 新增 50x.html 错误页面文件
- 更新 nginx.conf 配置:
  - 修改服务器名称为 team12.10813352.xyz
  - 优化前端静态文件配置,添加缓存和 Gzip 压缩策略
  - 更新后端 API 代理地址
  - 添加长连接支持和超时设置
  - 配置错误页面
  - 增加安全头设置

Change-Id: Ib765f7ed370de721bfab23e441e51ea77fa6740f
diff --git a/50x.html b/50x.html
new file mode 100644
index 0000000..c009f2c
--- /dev/null
+++ b/50x.html
@@ -0,0 +1,19 @@
+<!DOCTYPE html>
+<html>
+<head>
+    <title>服务器错误</title>
+    <meta charset="utf-8">
+    <style>
+        body {
+            width: 35em;
+            margin: 0 auto;
+            font-family: Tahoma, Verdana, Arial, sans-serif;
+        }
+    </style>
+</head>
+<body>
+    <h1>六百六十六,服务器内部错误</h1>
+    <p>抱歉,服务器遇到了内部错误,无法完成您的请求。</p>
+    <p>请稍后再试。</p>
+</body>
+</html> 
\ No newline at end of file
diff --git a/nginx.conf b/nginx.conf
index 78e9b9e..ab42dba 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -1,29 +1,52 @@
 server {
     listen 80;
-    server_name localhost;
-
+    server_name team12.10813352.xyz;
+    
+    # 前端静态文件配置
     root /usr/share/nginx/html;
     index index.html;
-
-    # 开启 gzip 压缩
-    gzip on;
-    gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
-
-    # 所有静态资源
+    
+    # 解决 React Router 单页应用路由问题
     location / {
         try_files $uri $uri/ /index.html;
+        
+        # 缓存策略
+        expires 7d;  # 静态资源缓存7天
+        add_header Cache-Control "public";
+        
+        # Gzip 压缩
+        gzip on;
+        gzip_types text/plain text/css application/json application/javascript text/xml application/xml application/xml+rss text/javascript;
+        gzip_min_length 1024;
+        gzip_comp_level 6;
     }
-
-    # 后端 API 代理 - 修改为宿主机地址
+    
+    # API 请求代理到后端
     location /api/ {
-        proxy_pass http://host.docker.internal:8080/api/;
-        proxy_http_version 1.1;
-        proxy_set_header Upgrade $http_upgrade;
-        proxy_set_header Connection 'upgrade';
+        proxy_pass http://202.205.102.121:5001/;  # 后端服务地址
         proxy_set_header Host $host;
         proxy_set_header X-Real-IP $remote_addr;
         proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
         proxy_set_header X-Forwarded-Proto $scheme;
-        proxy_cache_bypass $http_upgrade;
+        
+        # 长连接支持
+        proxy_http_version 1.1;
+        proxy_set_header Connection "";
+        
+        # 超时设置
+        proxy_connect_timeout 60s;
+        proxy_send_timeout 60s;
+        proxy_read_timeout 60s;
     }
-} 
\ No newline at end of file
+    
+    # 错误页面配置
+    error_page 404 /index.html;
+    error_page 500 502 503 504 /50x.html;
+    
+    # 安全头设置
+    add_header X-Frame-Options "SAMEORIGIN" always;
+    add_header X-XSS-Protection "1; mode=block" always;
+    add_header X-Content-Type-Options "nosniff" always;
+    add_header Referrer-Policy "no-referrer-when-downgrade" always;
+    add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; font-src 'self' data:" always;
+}
\ No newline at end of file