FROM python:3.10-slim

ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    PORT=5000

WORKDIR /app

# Keep image minimal; add build tools only if future deps require them
RUN apt-get update -y && apt-get install -y --no-install-recommends \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# Install dependencies (better layer caching)
COPY requirements.txt ./
RUN pip install --upgrade pip && pip install -r requirements.txt

# Copy application code
COPY app.py ./
COPY templates ./templates
COPY static ./static

# Environment variables from Coolify (if used)
ENV DEMO=$DEMO

EXPOSE 5000

# Production server (use shell form so $PORT expands in Coolify)
CMD gunicorn -w ${WEB_CONCURRENCY:-3} -b 0.0.0.0:${PORT:-5000} app:app