Dockerfile

FROM node:20-slim

# Install Python and system dependencies
RUN apt-get update && apt-get install -y \
    python3.11 \
    python3-pip \
    python3.11-venv \
    git \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# Create a non-root user (required by HF Spaces)
RUN useradd -m -u 1000 user
USER user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH

# Set working directory
WORKDIR $HOME/app

# Copy backend files only
COPY --chown=user embedding_api.py $HOME/app/
COPY --chown=user requirements_embedding.txt $HOME/app/
COPY --chown=user hono-proxy $HOME/app/hono-proxy

# Create Python virtual environment
RUN python3.11 -m venv $HOME/venv
ENV PATH="$HOME/venv/bin:$PATH"

# Install Python dependencies for embedding API
RUN pip install --upgrade pip
RUN pip install -r requirements_embedding.txt

# Install pnpm and Node dependencies for Hono proxy
RUN npm install -g pnpm
WORKDIR $HOME/app/hono-proxy
RUN pnpm install

# Copy Vespa certificates (these need to be included in the repo)
RUN mkdir -p $HOME/.vespa/il-infra.colpali-server.default
COPY --chown=user vespa-certs/* $HOME/.vespa/il-infra.colpali-server.default/ || true

# Create startup script for backend services only
WORKDIR $HOME/app
RUN cat > start-backend.sh << 'EOF'
#!/bin/bash

# Start embedding API on port 8001
echo "Starting ColPali embedding API on port 8001..."
python embedding_api.py &
EMBED_PID=$!

# Wait for embedding API to be ready
sleep 10

# Start Hono proxy on HF Spaces port 7860
echo "Starting Hono proxy on port 7860..."
cd hono-proxy && PORT=7860 CORS_ORIGIN="*" EMBEDDING_API_URL="http://localhost:8001" npx tsx src/index.ts

# If Hono exits, kill embedding service
kill $EMBED_PID
EOF

RUN chmod +x start-backend.sh

# Expose HF Spaces port (Hono proxy will run on this)
EXPOSE 7860

# Run the startup script
CMD ["./start-backend.sh"]