Build both python 3.5 and 2.7 images from the same env

environments/python/Dockerfile-2.7

@@ -0,0 +1,14 @@
+FROM alpine:3.5
+
+RUN apk update
+RUN apk add --no-cache python python-dev build-base py-pip
+RUN pip install --upgrade pip
+RUN rm -r /root/.cache
+
+COPY . /app
+WORKDIR /app
+RUN pip install -r requirements.txt
+
+ENTRYPOINT ["python"]
+CMD ["server.py"]
+