[Doc] How to use `env`?

[east4ming]

Bug Report

konfig.md 如下:

import models.kube.frontend
import models.kube.frontend.container
import models.kube.templates.resource as res_tpl

appConfiguration: frontend.Server {
    mainContainer = container.Main {
        name = "php-redis"
        env = [
            {
                name = "GET_HOSTS_FROM"
                value = "dns"
            }
        ]
        ports = [{containerPort = 80}]
    }
    selector = {
        tier = "frontend"
    }
    podMetadata.labels: {
        tier = "frontend"
    }
    schedulingStrategy.resource = res_tpl.tiny
}

但是实际执行报错：

expected EnvMap, got [{str(name) | str(value):str(GET_HOSTS_FROM) | str(dns)}](TypeError)
container.k(68, 5): variable is defined here, its type is EnvMap, but got [{str(name) | str(value):str(GET_HOSTS_FROM) | str(dns)}]

1. Minimal reproduce step (Required)

如上

2. What did you expect to see? (Required)

按照文档可以正确使用

3. What did you see instead (Required)

如上

4. What is your KCL components version? (Required)

1. kcl 0.9.0 beta
2. konfig 0.5.0

[Peefy]

Here's an example: https://github.com/kcl-lang/konfig/blob/01ca24c02ea25c8093e515754388ab97981d9a3d/models/kube/frontend/server.k#L80

[east4ming]

Got it. Tks