Dockerfile

FROM python:3.10-slim

# Set working directory (all paths will be relative to this)
WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    gcc \
    python3-dev \
    && rm -rf /var/lib/apt/lists/*

# Create writable directory for NLTK data
RUN mkdir -p /app/nltk_data && chmod a+rwx /app/nltk_data
ENV NLTK_DATA=/app/nltk_data

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

# Download NLTK data to our writable directory
RUN python -c "import nltk; \
    nltk.download('punkt', download_dir='/app/nltk_data'); \
    nltk.download('punkt_tab', download_dir='/app/nltk_data')"

# Copy application code
COPY . .

EXPOSE 8501
CMD ["streamlit", "run", "app.py", "--server.port=8501", "--server.address=0.0.0.0"]