rewrite nginx

http://example.com:8000/image/ -> https://example1.com/

这样一个重定向，该怎么写？
我试了rewrite ^(/image)$ https://example1.com/ permenant
结果重定向到https://example1.com/image/

---

如果你用的openresty，可以看看这个 https://.com/a/1190000004680996

---

server {
    listen       8000;
    ...

    location = /image/ {
        proxy_pass https://example1.com/;
    }
}