Added docker configuration to serve and build documentation with livereload

docs/Dockerfile

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+FROM python:3.6-alpine
+
+RUN pip install sphinx livereload
+WORKDIR /app/docs

docs/serve.py

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+#!/usr/bin/env python
+from subprocess import call
+# initial make
+call(["python", "-m", "sphinx", ".", "/tmp/_build"])
+from livereload import Server, shell
+
+server = Server()
+server.watch('.', shell('python -m sphinx . /tmp/_build'))
+server.serve(
+    root='/tmp/_build/',
+    liveport=35730,
+    port=8001,
+host='0.0.0.0')