FROM python:3.8-slim-buster

# Keeps Python from generating .pyc files in the container
ENV PYTHONDONTWRITEBYTECODE 1

# Turns off buffering for easier container logging
ENV PYTHONUNBUFFERED 1

# Install pip requirements
ADD requirements.txt .
RUN python -m pip install -r requirements.txt

WORKDIR /app
ADD dockstat.py /app

EXPOSE 8080

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

HEALTHCHECK --interval=30s --timeout=3s --retries=1 \
  CMD python3 /app/dockstat.py --healthcheck