nginx 非www跳www，www跳非www，http跳https

if ($host ~ ^(?!www\.)(?<domain>.+)$) {
    return  301 $scheme://www.$domain$request_uri;
}

if ($host ~ ^www\.(?<domain>.+)$) {
    return  301 $scheme://$domain$request_uri;
}

if ($host != "example.com") {
    return  301 $scheme://example.com$request_uri;
}

if ($scheme != "https") {
       return 301 https://$host$request_uri;
   } # managed by Certbot