Dockerfile

# Stage 1: Builder
FROM python:3.9-slim as builder

WORKDIR /app
COPY requirements.txt .

RUN apt-get update && \
    apt-get install -y --no-install-recommends \
    gcc \
    python3-dev \
    && rm -rf /var/lib/apt/lists/*

RUN pip install --user --no-cache-dir -r requirements.txt

# Stage 2: Runtime
FROM python:3.9-slim

WORKDIR /app

# Install runtime dependencies
RUN apt-get update && \
    apt-get install -y --no-install-recommends \
    ffmpeg \
    && rm -rf /var/lib/apt/lists/*

# Copy Python dependencies
COPY --from=builder /root/.local /root/.local
COPY --from=builder /app/requirements.txt .

# Application files
COPY app.py audio_generator.py ./

# Create output directory with correct permissions
RUN mkdir -p /app/tts_outputs && \
    chmod 777 /app/tts_outputs

# Environment configuration
ENV PATH=/root/.local/bin:$PATH \
    PYTHONUNBUFFERED=1 \
    PYTHONPATH=/app \
    PORT=7860

# Healthcheck
HEALTHCHECK --interval=30s --timeout=10s \
    CMD curl -f http://localhost:${PORT}/health || exit 1

EXPOSE ${PORT}

# Run as non-root user
RUN useradd -m ttsuser && \
    chown -R ttsuser /app
USER ttsuser

CMD ["python", "app.py"]