edit readme and modify dockerfile

Dockerfile

@@ -1,5 +1,5 @@
 FROM python:2.7
-MAINTAINER Eric Taieb Walch <teknologist@gmail.com>
+LABEL org.opencontainers.image.authors="Eric Taieb Walch <teknologist@gmail.com>"
 
 RUN mkdir /app && \
 cd /app && \

README.md

@@ -1,5 +1,6 @@
 # docker-webNUT
 
+This repository is a fork of https://github.com/teknologist/docker-webnut
 
 webNUT (UPS network monitoring web ui) dockerized.