配置index.html不缓存，解决应用不更新的问题

1. 前端配置

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=8">
<meta http-equiv="Expires" content="0">
<meta http-equiv="Pragma" content="no-cache">
<meta http-equiv="Cache-control" content="no-cache">
<meta http-equiv="Cache" content="no-cache">

2. nginx配置

location / {
 expires 1h;
 root /home/html;
 index index.html index.htm;

 ## html不缓存 
 if ($request_filename ~* .*\.(htm|html)$) 
 {
     add_header Cache-Control "no-store";
 }
}