switched Docker base image to alpine3.5

Dockerfile

@@ -1,11 +1,29 @@
-FROM phusion/baseimage:0.9.19
-MAINTAINER Nat Morris "nat@nuqe.net"
+FROM alpine:3.5
+MAINTAINER Nat Morris <nat@nuqe.net>
 
-COPY aaisp-to-mqtt.py /usr/local/bin/aaisp-to-mqtt.py
+RUN apk add --update \
+    python \
+    python-dev \
+    py-pip \
+    build-base \
+  && pip install virtualenv
 
-RUN apt-get update
-RUN apt-get install -y python-pip python-dev libffi-dev libssl-dev
-ADD requirements.txt /tmp
-RUN pip install --upgrade -r /tmp/requirements.txt
+#ENV LIBRARY_PATH=/lib:/usr/lib
+#RUN ln -s /usr/include/locale.h /usr/include/xlocale.h
 
-RUN apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+# Copy requirements before app so we can cache PIP dependencies on their own
+RUN mkdir /app
+COPY requirements.txt /app/requirements.txt
+WORKDIR /app
+RUN virtualenv /env && /env/bin/pip install -r /app/requirements.txt
+
+COPY aaisp-to-mqtt.py /app/
+
+RUN rm -rf \
+	         /root/.cache \
+	        /tmp/*
+RUN rm -rf /var/cache/apk/*
+
+EXPOSE 8080/tcp
+
+CMD ["/env/bin/python", "/app/aaisp-to-mqtt.py", "-c /config/config.cfg"]