fix-or-question: graphiql and `dev`

[jjangga0214]

gateway.config.ts

import { defineConfig } from '@graphql-hive/gateway'

export const gatewayConfig = defineConfig({
  port: 8080,
  graphiql: true,
  // ... other options are omitted for brevity
})

Let's say I execute this command.

$ hive dev \
        --service auth --url http://localhost:8081/graphql \
        --service api --url http://localhost:8083/graphql \
        --watch

Then a successful message is printed out.

ℹ Watch mode enabled
✔ Composition successful
Saving supergraph schema to supergraph.graphql
ℹ Watching for changes

But there's no response when I access http://localhost:8080 or http://localhost:8080/graphql, etc.

I also wonder about the API endpoint.
Where should I send a request like POST for query and mutation or websocket for subscription?
Is it configurable?
(As far as I searched, there's no info from the docs.)

Thanks.