Fix PermissionError by setting AUDIO_DIR to /app/audio_output for Hugging Face Spaces compatibility

app.py

@@ -25,7 +25,7 @@ logger = logging.getLogger("talklas-api")
 app = FastAPI(title="Talklas API")
 
 # Mount a directory to serve audio files
-AUDIO_DIR = "audio_output"
+AUDIO_DIR = "/app/audio_output"  # Use absolute path within /app
 os.makedirs(AUDIO_DIR, exist_ok=True)
 app.mount("/audio_output", StaticFiles(directory=AUDIO_DIR), name="audio_output")