Dockerfile

# Use Python 3.13-slim as the base image for a smaller footprint
FROM python:3.13-slim

# Set working directory
WORKDIR /app

# Install system dependencies
# build-essential is often needed for some python libraries
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# Copy only the requirements first to leverage Docker cache
COPY requirements.txt .

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

# Copy the core library (src) and the web layer (backend)
COPY src/ ./src/
COPY backend/ ./backend/

# Expose the port (Cloud Run will inject $PORT)
ENV PORT 8080

# Command to run the application using uvicorn
# We use the dynamic $PORT environment variable
CMD uvicorn backend.main:app --host 0.0.0.0 --port $PORT