因为国内访问nextcloud实在太慢了，所以我们需要开启代理
参考下面
Try setting the proxy url and authentication in the config/config.php file. For example,
‘proxy’ => ‘myproxy.server.ext’,
‘proxyuserpwd’ => ‘username:password’
Take a look at config/config.sample.php for more information.
在配置文件里面加上 \'proxy\' => \'192.168.123.95:7890\' 就够了
