add cache

nginx.conf

@@ -137,7 +137,8 @@ http {
             #add_header Cache-Control "no-store, no-cache, must-revalidate, max-age=0";
             #add_header Pragma "no-cache";
             #add_header Expires "0";
-            add_header Cache-Control "max-age=86400";
+            #add_header Cache-Control "max-age=86400";
+            add_header Cache-Control "no-cache, must-revalidate";
             sendfile on;
         } 
         # 未匹配的请求