If I want to host different apps/apis on different subdomains, how do I do that and test it locally?...

# ktor

[Amaan]

If I want to host different apps/apis on different subdomains, how do I do that and test it locally? I tried doing the following:

fun Application.configureRouting() {
    routing {
        host("localhost:8080") {
            home()
        }
        host("chat.localhost:8080") {
            chat()
        }
    }
}

but that doesn't seem to work when I test it on my browser.

[Aleksei Tirman [JB]]

You have to pass a port as the second argument for the host method or remove it from the first argument.

[Amaan]

Hmm, that seems to work, but not when I run it in my docker container. I have the following code now:

val host = environment.config.host
val port = environment.config.port
routing {
    host(host, port) {
        home()
    }
    host("chat.$host", port) {
        chat()
    }
}

and in application.conf I have

ktor {
    deployment {
        host = localhost
...

When I run a docker container, I can't access the localhost of the container from my localhost endpoint (I put in chat.localhost:8080, but I can't get access to the one in the container). However, when I just run Main.kt, it works just fine. The reason I want to use a container is so I can host it online and make sure the subdomains work there too.
Removing the host name from the application.conf works to access 0.0.0.0:8080, but then I can't access the chat subdomain.