FROM python:3.10-slim
WORKDIR /app

COPY requirements.txt .
RUN pip install -U pip wheel && pip install -r requirements.txt

COPY . .

ENV PORT=7860
EXPOSE 7860

# Use sh -c so $PORT expands; falls back to 7860 if not set
CMD ["sh","-c","gunicorn -w 2 -k gthread -b 0.0.0.0:${PORT:-7860} app:app"]