Dockerfile.backend

FROM python:3.11-slim

WORKDIR /app

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

# Install ultra-slim CPU PyTorch
RUN pip install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cpu

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

# Pre-cache embedding model weights into image layer to eliminate cold-start timeouts
RUN python -c "from sentence_transformers import SentenceTransformer; SentenceTransformer('Orange/orange-nomic-v1.5-1536', trust_remote_code=True)"

# Copy application modules
COPY core/ ./core/
COPY storage/ ./storage/
COPY ingestion/ ./ingestion/
COPY components/ ./components/
COPY app.py .
COPY cli.py .

EXPOSE 8000

# Dynamic PORT handling for local (8000) vs Cloud Run ($PORT)
CMD ["sh", "-c", "uvicorn app:app --host 0.0.0.0 --port ${PORT:-8000}"]