Dockerfile

FROM python:3.10-slim

# 1. Install system dependencies
RUN apt-get update && apt-get install -y \
    libsndfile1 \
    ffmpeg \
    sox \
    curl \
    git-lfs \
    && rm -rf /var/lib/apt/lists/*

# 2. Create non-root user (moved up for better permissions)
RUN useradd -m appuser
# 3. Create directory structure (with proper ownership from the start)
RUN mkdir -p \
    /tmp/matplotlib \
    /tmp/fontconfig \
    /tmp/lhotse \
    /app/uploads \
    /app/processed_audio \
    /app/assets && \
    chown -R appuser:appuser /app /tmp/matplotlib /tmp/fontconfig /tmp/lhotse

# 4. Set working directory
WORKDIR /app

# 5. Copy application files
COPY --chown=appuser:appuser . .

# 6. Set environment variables
ENV MPLCONFIGDIR=/tmp/matplotlib \
    FONTCONFIG_PATH=/tmp/fontconfig \
    LHOTSE_CACHE_DIR=/tmp/lhotse \
    HF_HUB_ENABLE_HF_TRANSFER=1 \
    PYTHONUNBUFFERED=1

# 7. Install Python dependencies
USER appuser
RUN pip install --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt && \
    python -m spacy download en_core_web_sm && \
    pip check

# 8. Health check
HEALTHCHECK --interval=30s --timeout=10s \
    CMD curl -f http://localhost:7860/ || exit 1

# 9. Run the application
CMD ["python", "app.py"]