Change Debian->Alpine base container system.

Dockerfile

@@ -1,15 +1,19 @@
-FROM debian:stretch-slim
-RUN apt-get update && apt-get install -y python python-pip mosquitto git
+#FROM debian:stretch-slim
+#RUN apt-get update && apt-get install -y python python-pip mosquitto git
+
+FROM alpine:latest
+
+RUN apk update && apk upgrade
+
+RUN apk add --update --no-cache python3 py3-pip py3-setuptools mosquitto git && \
+	if [ ! -e /usr/bin/python ]; then ln -f /usr/bin/python3 /usr/bin/python ; fi && \
+	if [ ! -e /usr/bin/pip ]; then ln -f /usr/bin/pip3 /usr/bin/pip ; fi
 
-# Install paho-mqtt
-RUN yes | pip install paho-mqtt
 
 # Install paho-mqtt wrapper
 RUN git clone https://git.blackfinn.de/python/mqtt.git && \
-    cd mqtt && \
-    ./setup.py install && \
-    cd .. && \
-    rm -rf mqtt
+	cd mqtt && ./setup.py install && \
+    	rm -rf mqtt
 
 # Install mqtt-logger
 RUN git clone https://git.blackfinn.de/python/mqtt_logger.git