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FROM python:3.9-slim

WORKDIR /code

# Redirect HF cache to /tmp/.cache for better performance
ENV HF_HOME=/tmp/.cache
ENV TRANSFORMERS_CACHE=/tmp/.cache

# Add additional environment variables for optimization
ENV PYTHONUNBUFFERED=1
ENV PYTHONDONTWRITEBYTECODE=1

# Install system dependencies if needed (uncomment if you need curl for health checks)
# RUN apt-get update && apt-get install -y curl && rm -rf /var/lib/apt/lists/*

# Copy and install Python dependencies first (better Docker layer caching)
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy the app directory with your main.py file
COPY app ./app

# Add health check to monitor container health
HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
  CMD python -c "import requests; requests.get('http://localhost:7860/health', timeout=5)" || exit 1

# Start the application
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]