# Use official Python base image (faster & smaller than Ubuntu + manual Python)
FROM python:3.10-slim

# Set working directory
WORKDIR /app

# Prevent Python from buffering stdout/stderr
ENV PYTHONUNBUFFERED=1

# Copy requirements first for better caching
COPY requirements.txt .

# Use PyPI mirror + increased timeout to avoid network errors
RUN pip install --no-cache-dir -r requirements.txt \
    -i https://pypi.org/simple \
    --timeout=100

# Copy application code
COPY . .

# Environment variables
ENV FLASK_ENV=production
ENV FLASK_APP=run.py
ENV FLASK_RUN_HOST=0.0.0.0
ENV FLASK_RUN_PORT=5000

# Expose the Flask port
EXPOSE 5000

# Use Gunicorn for production
CMD ["gunicorn", "--bind", "0.0.0.0:5000", "run:app"]