www 这个我直接在 DNS 上配置了解析跳转。
然后 Nginx 配置 HTTP 跳转 HTTPS :
server {
  listen 80;
  server_name 
xxx.xxx;
  location / {
    rewrite (.*) 
https://xxx.xxx$1 permanent;
  }
}
server {
  listen 443 ssl http2;
  server_name 
xxx.xxx;
  # let the browsers know that we only accept HTTPS
  add_header Strict-Transport-Security "max-age=63072000; includeSubdomains; preload";
  ssl on;
  ssl_certificate /path/to/crt;
  ssl_certificate_key /path/to/key;
  ssl_dhparam /path/to/pem;
  ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
  ssl_stapling on;
  ssl_ciphers "EECDH+AESGCM:EDH+AESGCM:ECDHE-RSA-AES128-GCM-SHA256:AES256+EECDH:DHE-RSA-AES128-GCM-SHA256:AES256+EDH:ECDHE-RSA-AES256-GCM-SHA384:DHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:ECDHE-RSA-AES256-SHA:ECDHE-RSA-AES128-SHA:DHE-RSA-AES256-SHA256:DHE-RSA-AES128-SHA256:DHE-RSA-AES256-SHA:DHE-RSA-AES128-SHA:ECDHE-RSA-DES-CBC3-SHA:EDH-RSA-DES-CBC3-SHA:AES256-GCM-SHA384:AES128-GCM-SHA256:AES256-SHA256:AES128-SHA256:AES256-SHA:AES128-SHA:DES-CBC3-SHA:HIGH:!aNULL:!eNULL:!EXPORT:!DES:!MD5:!PSK:!RC4";
  ssl_prefer_server_ciphers on;
  ssl_session_cache shared:SSL:10m;
  ssl_session_timeout 10m;
  location / {
    proxy_set_header   X-Real-IP $remote_addr;
    proxy_set_header   Host      $http_host;
    proxy_pass         http://127.0.0.1:xxxx;
  }
}