修复错误

Caddyfile

@@ -1,14 +1,20 @@
 {
-    # admin off  # disable admin if wanted
+	# 如需关闭管理接口，可取消下一行注释 / Uncomment to disable admin API
+	# admin off
 }
 
 skin.khhao.com {
-    # Reverse proxy all /api* requests to the backend service
-    reverse_proxy /api* backend:8080
+	encode gzip zstd
 
-    # Serve static files for the frontend (SPA)
-    file_server / {
-        root * /usr/share/caddy
-        try_files {path} {path}/index.html
-    }
-}
+	# API 请求反向代理到后端服务 / Proxy API requests to backend
+	handle /api* {
+		reverse_proxy backend:8080
+	}
+
+	# 前端 SPA 静态文件 / Serve frontend SPA
+	handle {
+		root * /usr/share/caddy
+		try_files {path} {path}/ /index.html
+		file_server
+	}
+}