Content-Type header seems to be fixed to application/json

[p3et]

Hello, I want to set content-type header to text/plain in a response to a get request. I tried your example but without Schema.struct it does not compile. The code below compiles but the response has still application/json. Could you please tell me how to set content-type header correctly?

import {Effect} from "effect";
import {NodeServer} from "effect-http";
import {PrettyLogger} from "effect-log";
import {RouterBuilder} from "effect-http";
import {Api} from "effect-http";
import * as Schema from "@effect/schema/Schema";

export const api = Api.api({title: "Example API"}).pipe(
  Api.get("root", "/", {
    response: {
      status: 200,
      content: Schema.string,
      headers: Schema.struct({"Content-Type": Schema.string}),
    },
  }),
);

export const app = RouterBuilder.make(api).pipe(
  RouterBuilder.handle("root", () =>
    Effect.succeed({
      content: "Hello World!",
      status: 200 as const,
      headers: {"content-type": "text/plain"},
    }),
  ),
  RouterBuilder.build,
)

const program = app.pipe(
  NodeServer.listen({port: 3000}),
  Effect.provide(PrettyLogger.layer()),
);

Effect.runPromise(program);

{
"dependencies": {
    "@effect/schema": "^0.48.3",
    "effect": "2.0.0-next.55",
    "effect-http": "^0.39.0",
    "effect-log": "^0.23.1"
  },
  "devDependencies": {
    "prettier": "^3.1.0",
    "tsx": "^4.1.3",
    "typescript": "^5.2.2"
  }
}