minor reduction in docker image size

Author: samuelcolvin

Dockerfile

@@ -2,10 +2,10 @@ FROM python:3.6
 
 RUN pip install aiohttp==2.1.0
 ADD ./pydf /pydf
-ADD setup.py /setup.py
-RUN python /setup.py install
+ADD setup.py /
+RUN pip install -e .
 
 LABEL maintainer '[email protected]'
 
-ADD ./docker.py /run.py
-ENTRYPOINT ["/run.py"]
+ADD ./docker-entrypoint.py /
+ENTRYPOINT ["/docker-entrypoint.py"]