fix: use APInex TTS for voice ideas

Dockerfile

@@ -3,9 +3,6 @@ FROM python:3.12-slim
 ENV PYTHONDONTWRITEBYTECODE=1 \
     PYTHONUNBUFFERED=1
 
-RUN apt-get update && apt-get install -y --no-install-recommends espeak-ng lame \
-    && rm -rf /var/lib/apt/lists/*
-
 WORKDIR /app
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt