exchange openresty upload image module

file_upload/README.md

@@ -2,14 +2,14 @@
 
 - 配置openresty
 
-  ```nginx
+  ```nginx configuration
   # 配置文件路径
   # /usr/local/openresty/nginx/conf/nginx.conf
   # http contex 中添加lua脚本的路径
   lua_package_path "/usr/local/openresty/resty_funcs/?.lua;;";
   ```
 
-  ```nginx
+  ```nginx configuration
   # 子域名配置文件路径
   # /usr/local/openresty/nginx/conf.d/music-room.conf