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FROM python:3.9-slim

WORKDIR /app

# Copy requirements first for better caching
COPY requirements.txt .

# Install dependencies
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application
COPY . .

# Download NLTK data
RUN python -c "import nltk; nltk.download('punkt')"

# Make port 7860 available for Hugging Face Spaces
EXPOSE 7860

# Set environment variables for Streamlit
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1 \
    STREAMLIT_SERVER_PORT=7860 \
    STREAMLIT_SERVER_HEADLESS=true \
    STREAMLIT_SERVER_ENABLE_CORS=false

# Command to run the application
CMD ["streamlit", "run", "app.py", "--server.address=0.0.0.0"]