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FROM python:3.9-slim

# Set working directory
WORKDIR /app

# Set safe home and Streamlit config path
ENV HOME=/app
ENV STREAMLIT_HOME=/app/.streamlit

# Install dependencies
RUN apt-get update && apt-get install -y \
    build-essential \
    curl \
    git \
    && rm -rf /var/lib/apt/lists/*

# Copy files
COPY requirements.txt ./
COPY src/ ./src/

# Create .streamlit directory and config files before install
RUN mkdir -p $STREAMLIT_HOME && \
    echo "\
[server]\n\
headless = true\n\
port = 8501\n\
enableCORS = false\n\
\n\
[theme]\n\
base = 'light'\n\
" > $STREAMLIT_HOME/config.toml && \
    touch $STREAMLIT_HOME/machine_id_v4  # ensure file exists

# Install Python dependencies
RUN pip3 install --no-cache-dir -r requirements.txt

# Expose port
EXPOSE 8501

# Health check
HEALTHCHECK CMD curl --fail http://localhost:8501/_stcore/health

# Entrypoint to run app
ENTRYPOINT ["streamlit", "run", "src/streamlit_app.py", "--server.port=8501", "--server.address=0.0.0.0"]