Dockerfile

# syntax=docker/dockerfile:1
FROM python:3.11-slim AS runtime

# Install system deps (curl for healthcheck/debugging)
RUN apt-get update \
    && apt-get install -y --no-install-recommends curl \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Prevent Python from writing .pyc files and buffer logs
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1

# Install dependencies first (leverage layer caching)
COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

# Copy application code
COPY . .

# Expose FastAPI default port
EXPOSE 8000

# Default environment variables (can be overridden)
ENV PORT=8000

# Run the app
CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "8000"]