create first version of Dockerfile

This is just a first version of a Dockerfile for using hddfancontrol inside docker.
To use this one needs to provide all hddfancontrol arguments via the env variable ARGS

Dockerfile

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+#use official slim python image
+FROM python:slim-buster
+
+#update repository
+RUN apt-get update
+
+#install needed packages
+RUN apt-get install -y smartmontools hdparm hddtemp fancontrol
+
+#install hddfancontrol
+RUN pip3 install hddfancontrol
+
+#start hddtemp daemon and expose port
+#EXPOSE 7634
+#CMD hddtemp -q -d -F /dev/sd*
+
+CMD hddfancontrol $ARGS