backend/Dockerfile

# Use Python 3.9 slim image
FROM python:3.9-slim

# Set working directory
WORKDIR /app

# Set environment variables for UTF-8 encoding
ENV PYTHONDONTWRITEBYTECODE 1
ENV PYTHONUNBUFFERED 1
ENV LANG=C.UTF-8
ENV LC_ALL=C.UTF-8
ENV PYTHONIOENCODING=utf-8
ENV PYTHONUTF8=1
ENV DOCKER_CONTAINER=true

# Install system dependencies
RUN apt-get update \
    && apt-get install -y --no-install-recommends \
        build-essential \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements file
COPY requirements.txt .

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

# Copy project files
COPY . .

# Create non-root user
RUN adduser --disabled-password --gecos '' appuser
RUN chown -R appuser:appuser /app
USER appuser

# Expose port
EXPOSE 5000

# Run the application
CMD ["python", "app.py"]