nginx 反向代理其他域名

最近有个需求，网站a.com是个官网，要求a.com/paylink 跳转到 b.com

配置如下

server
    {
        listen       80;
        server_name  a.com;
        rewrite ^(.*) https://$server_name$1 permanent;
    }
server
    {
        listen       443 ssl;
        server_name  a.com;
         root /xxxx/dist;
        ssl_certificate /a.com.crt;
        ssl_certificate_key /a.com.key;
        ssl_protocols TLSv1.2 TLSv1.3;
        ssl_ciphers ECDHE-RSA-AES128-GCM-SHA256:HIGH:!aNULL:!MD5:!RC4:!DHE;
        ssl_prefer_server_ciphers on;
        location /paylink/ {
        proxy_pass https://b.com/;
        }
       location ~ /static/.*\.(js|css)$ {
      proxy_pass https://b.com;
       rewrite ^/paylink/static/(.*)$ /static/$1 last;
       }
        location = /40x.html {
        }
        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
        }
    }

参考：http://www.itluntan.cn/?post=257