build: 更新 Dockerfile 和 Nginx 配置

- 从 /etc/nginx/conf.d/ 目录中删除所有 .conf 文件
- 注释掉 nginx.conf 中的 root 和 index 指令

Change-Id: I5e860734c5b0f595ebce34a0eccf15ddf672a427
diff --git a/Dockerfile b/Dockerfile
index f37ae8d..940105e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,6 +16,7 @@
 COPY dist /usr/share/nginx/html
 COPY 50x.html /usr/share/nginx/html
 
+RUN rm -f /etc/nginx/conf.d/*.conf
 # 复制 Nginx 配置文件
 COPY nginx.conf /etc/nginx/conf.d/default.conf
 
diff --git a/nginx.conf b/nginx.conf
index f47bcb6..7033752 100644
--- a/nginx.conf
+++ b/nginx.conf
@@ -3,8 +3,8 @@
     server_name team12.10813352.xyz;
     
     # 前端静态文件配置
-    root /usr/share/nginx/html;
-    index index.html;
+    # root /usr/share/nginx/html;
+    # index /dist/index.html;
     
     # 解决 React Router 单页应用路由问题
     location / {