FROM python:3.12-slim

ENV PYTHONUNBUFFERED=1 \
    BUTTON_HOST=0.0.0.0 \
    BUTTON_PORT=8000 \
    BUTTON_DATA_FILE=/data/data.json \
    BUTTON_DATABASE_FILE=/data/data.sqlite3 \
    BUTTON_MAILING_LIST_FILE=/data/mailing_list.csv

RUN useradd --system --uid 10001 --no-create-home button \
    && mkdir /data && chown button /data

WORKDIR /app
COPY server.py ./
COPY static ./static

USER button
VOLUME /data
EXPOSE 8000
# Python as PID 1 ignores SIGTERM; SIGINT raises KeyboardInterrupt for a clean exit.
STOPSIGNAL SIGINT

CMD ["python", "server.py"]