Dockerfile

# Stage 1: Builder
FROM python:3.10-slim AS builder

# Install build dependencies
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    libgomp1 \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Upgrade pip and install requirements
COPY requirements.txt .
RUN pip install --upgrade pip && pip install --no-cache-dir -r requirements.txt

# Stage 2: Runtime
FROM python:3.10-slim

# Install only runtime dependencies (no build-essential here)
RUN apt-get update && apt-get install -y --no-install-recommends \
    libgomp1 \
    curl \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Copy installed packages from builder
COPY --from=builder /usr/local /usr/local

# Copy application code
COPY app ./app
COPY models ./models

EXPOSE 8000

# Healthcheck: ping the FastAPI docs endpoint
HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
CMD curl --fail http://localhost:8000/docs || exit 1

CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8000"]