Dockerfile

FROM python:3.9-slim

WORKDIR /app

# Create a non-root user
RUN useradd -m appuser

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

# Create directories for matplotlib and set appropriate permissions
RUN mkdir -p /home/appuser/.config/matplotlib && \
    chown -R appuser:appuser /home/appuser/.config

# Copy requirements first for better caching
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy application files
COPY app.py .
COPY utils.py .

# Set ownership of application files
RUN chown -R appuser:appuser /app

# Set environment variable for matplotlib
ENV MPLCONFIGDIR=/home/appuser/.config/matplotlib

# Expose port for the application
EXPOSE 7860

# Switch to the non-root user
USER appuser

# Command to run the application
CMD ["python", "app.py"]