Dockerfile

# Use an official lightweight Python image
FROM python:3.11-slim

# Set environment variables for Python
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1

# Set the working directory
WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    libffi-dev \
    libssl-dev \
    python3-dev \
    && apt-get clean \
    && rm -rf /var/lib/apt/lists/*

# Upgrade pip, setuptools, and wheel
RUN pip install --no-cache-dir --upgrade pip setuptools wheel

# Copy only requirements first (to leverage Docker caching)
COPY requirements.txt .

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

# Copy the entire project
COPY . .

# Create a non-root user and switch to it
RUN useradd -m myuser
USER myuser

# Expose the Flask port
EXPOSE 5000

# Set environment variables for Flask
ENV FLASK_APP=app.py \
    FLASK_RUN_HOST=0.0.0.0

# Run the Flask app with Gunicorn
CMD ["gunicorn", "--bind", "0.0.0.0:5000", "--workers", "4", "app:app"]