Dockerfile

# Use the official Python 3.12 slim image as the base
FROM python:3.12-slim

# Set environment variables to prevent Python from writing .pyc files and to ensure output is flushed
ENV PYTHONUNBUFFERED=1 \
    PYTHONDONTWRITEBYTECODE=1

# Set the working directory inside the container
WORKDIR /app

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

# Copy only the requirements file to leverage Docker cache
COPY requirements.txt /app/

# Upgrade pip and install Python dependencies globally
RUN pip install --upgrade pip
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application code into the container
COPY . /app

# Create a non-root user for better security
RUN useradd -m appuser

# Change ownership of the /app directory to appuser
RUN chown -R appuser:appuser /app

# Switch to the non-root user
USER appuser

# Expose port 8080 for Cloud Run (or any other target environment)
EXPOSE 8080

# Command to run the application with Uvicorn
CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8080"]