Dockerfile.prod

# Production Dockerfile for Pulsefeed
FROM python:3.11-slim

WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    gcc \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first for better caching
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Install production WSGI server
RUN pip install --no-cache-dir gunicorn

# Copy application code
COPY . .

# Create instance directory
RUN mkdir -p /app/instance

# Create non-root user for security
RUN adduser --disabled-password --gecos '' appuser && \
    chown -R appuser:appuser /app
USER appuser

ENV PORT=5000
EXPOSE 5000

# Run with gunicorn + eventlet for WebSocket support
# Workers=1 required for Flask-SocketIO (maintains socket state)
CMD ["gunicorn", "--worker-class", "eventlet", "-w", "1", "--bind", "0.0.0.0:5000", "app:app"]