FROM python:3.9.1-alpine3.12 COPY requirements.txt dht22mqtt.py gpiomapping.py ./ RUN apk add gcc musl-dev && \ pip3 install -r requirements.txt --no-cache-dir && \ pip3 cache purge && \ apk del gcc musl-dev && \ rm -rf /var/lib/apk/lists/* && \ mkdir log && chmod 777 log/ CMD [ "python3", "-u", "dht22mqtt.py" ]