试试这个配置
```
server {
listen 80;
server_name example.com wwww.example.com;

return 301 https://$host$request_uri;
}

server {
listen 443 ssl http2;
server_name example.com www.example.com;

ssl_certificate /usr/local/nginx/ssl/example.com.crt;
ssl_certificate_key /usr/local/nginx/ssl/example.com.key;
ssl_session_timeout 5m;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:HIGH:!aNULL:!MD5:!RC4:!DHE;
ssl_prefer_server_ciphers on;

root /home/wwwroot/serverhome;
index index.htm index.html;

access_log /home/wwwlogs/example.com.log main;
}
```