Set response headers

src/assembly-ai/assembly-ai.controller.ts

@@ -1,5 +1,6 @@
-import { Body, Controller, Post } from '@nestjs/common';
+import { Body, Controller, Post, Res } from '@nestjs/common';
 import { ApiResponse } from '@nestjs/swagger';
+import { Response } from 'express';
 
 interface Utterance {
   speaker: string;
@@ -26,12 +27,15 @@ export class AssemblyAiController {
   })
   async utteranceToScript(
     @Body() body: { utterances: Utterance[] } | Utterance[],
+    @Res() res: Response,
   ) {
     const utterances = Array.isArray(body) ? body : body.utterances;
-    return utterances.map(
+    return res.header('Content-Type', 'text/plain; charset=utf-8').send(
+      utterances.map(
         (utterance) => `
 ${utterance.speaker}: 
 ${utterance.text}`,
+      ),
     );
   }
 }