feat(config): 更新环境配置和Nginx设置以支持动态端口配置

- 修改 .env.example 文件中的客户端API基础路径配置
- 将Dockerfile中的nginx.conf复制到模板目录以支持环境变量
- 在nginx配置中使用环境变量替换硬编码端口
- 为API文档路径(/docs、/redoc、/openapi.json)添加代理配置
- 移除硬编码的服务器地址，改用相对路径配置
- 更新docker-compose.yml以传递内部端口环境变量
- 简化nginx反向代理配置，移除冗余的服务器块配置

docker-compose.yml

@@ -118,6 +118,9 @@ services:
         ADMIN_WEB_NGINX_IMAGE: "${ADMIN_WEB_NGINX_IMAGE}"
         VITE_API_BASE: "${VITE_API_BASE}"
     container_name: ciyuan-admin-web
+    environment:
+      ADMIN_WEB_INTERNAL_PORT: "${ADMIN_WEB_INTERNAL_PORT}"
+      SERVER_INTERNAL_PORT: "${SERVER_INTERNAL_PORT}"
     expose:
       - "${ADMIN_WEB_INTERNAL_PORT}"
     depends_on:
@@ -138,6 +141,9 @@ services:
         VITE_CLIENT_NATIVE_API_BASE: "${VITE_CLIENT_NATIVE_API_BASE}"
         VITE_CLIENT_NATIVE_SERVER_ORIGIN: "${VITE_CLIENT_NATIVE_SERVER_ORIGIN}"
     container_name: ciyuan-clients
+    environment:
+      CLIENTS_INTERNAL_PORT: "${CLIENTS_INTERNAL_PORT}"
+      SERVER_INTERNAL_PORT: "${SERVER_INTERNAL_PORT}"
     expose:
       - "${CLIENTS_INTERNAL_PORT}"
     depends_on:
@@ -153,14 +159,11 @@ services:
     environment:
       NGINX_CLIENT_INTERNAL_PORT: "${NGINX_CLIENT_INTERNAL_PORT}"
       NGINX_ADMIN_INTERNAL_PORT: "${NGINX_ADMIN_INTERNAL_PORT}"
-      NGINX_SERVER_INTERNAL_PORT: "${NGINX_SERVER_INTERNAL_PORT}"
-      SERVER_INTERNAL_PORT: "${SERVER_INTERNAL_PORT}"
       CLIENTS_INTERNAL_PORT: "${CLIENTS_INTERNAL_PORT}"
       ADMIN_WEB_INTERNAL_PORT: "${ADMIN_WEB_INTERNAL_PORT}"
     ports:
       - "${CLIENT_WEB_PORT}:${NGINX_CLIENT_INTERNAL_PORT}"
       - "${ADMIN_WEB_PORT}:${NGINX_ADMIN_INTERNAL_PORT}"
-      - "${SERVER_WEB_PORT}:${NGINX_SERVER_INTERNAL_PORT}"
     volumes:
       - ./docker/nginx/default.conf:/etc/nginx/templates/default.conf.template:ro
     depends_on: