backend.dockerfile

# Build stage
FROM python:3.13-slim AS builder

# Install system dependencies including portaudio for pyaudio
RUN apt-get update && apt-get install -y \
    gcc \
    g++ \
    portaudio19-dev \
    python3-dev \
    && rm -rf /var/lib/apt/lists/*

# Create virtual environment
RUN python -m venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

# Copy requirements first for better layer caching
COPY backend/requirements.txt /tmp/requirements.txt

# Install Python dependencies
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r /tmp/requirements.txt

# Production stage
FROM python:3.13-slim AS production

# Install runtime dependencies only
RUN apt-get update && apt-get install -y \
    curl \
    portaudio19-dev \
    && rm -rf /var/lib/apt/lists/*

# Copy virtual environment from builder
COPY --from=builder /opt/venv /opt/venv
ENV PATH="/opt/venv/bin:$PATH"

# Create non-root user for security
RUN useradd --create-home --shell /bin/bash app && \
    mkdir -p /app && \
    chown app:app /app

# Copy application code
COPY --chown=app:app ./backend /app/backend

WORKDIR /app

# Set environment variables for the container
ENV SERVICE_ACCOUNT_KEY_PATH=/app/backend/serviceAccountKey.json

# Switch to non-root user
USER app

# Expose port
EXPOSE 8000

# Run the application
ENV PYTHONPATH="/app:${PYTHONPATH}"
CMD ["uvicorn", "backend.app.main:app", "--host", "0.0.0.0", "--port", "8000"]