GO web程序代理绑定域名非常频繁404的问题

用nginx做代理 配置文件如下： ``` server { listen 80; server_name leechan.online; location / { proxy_pass http://127.0.0.1:8888; proxy_http_version 1.1; #proxy_cache_bypass $http_upgrade; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection "upgrade"; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Proto $scheme; proxy_set_header X-Forwarded-Host $host; proxy_set_header X-Forwarded-Port $server_port; } access_log /home/wwwlogs/leechan.online.access.log; } ``` 但是经常出现404的情况，是非常频繁出现。 IP访问：http://117.50.7.147:8888 域名访问：http://leechan.online 各位大佬能指教一下是什么问题吗