i am not able add one of my own upstream

[pannet1]

Hi Mark,

Many thanks for your wonderful go proxy. I am very very new noobie. Please forgive my silly questions.

i am not able add one of my own upstream

Upstreams
// HTTPBin is used for testing
var Alice = &Upstream{
Name: "alice",
Host: "example.com",
}

configurations
Config{
Path: "/contact-us",
Upstream: upstreams.Alice,
}

route
/contact-us

result
$ http http://127.0.0.1:9001/contact-us`
HTTP/1.1 404 Not Found
Content-Length: 19
Content-Type: text/plain; charset=utf-8
Date: Sat, 06 Feb 2021 17:34:20 GMT
X-Content-Type-Options: nosniff
404 page not found