FROM python:3.9-slim

WORKDIR /code

# Install system dependencies if needed (e.g. for some pip packages)
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first to leverage cache
COPY requirements.txt .

# Install dependencies
# Using --no-cache-dir to keep image small
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application
COPY . .

# Set permissions for a non-root user (optional but good practice for HF)
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

# Expose the port (metadata in README also handles this but good for documentation)
EXPOSE 7860

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