add version

Dockerfile

@@ -1,6 +1,8 @@
 FROM alpine:3.5
 MAINTAINER Henning Jacobs <henning@jacobs1.de>
 
+ARG VERSION=latest
+
 EXPOSE 8080
 
 RUN apk add --no-cache python3 python3-dev gcc musl-dev zlib-dev libffi-dev openssl-dev ca-certificates && \
@@ -16,6 +18,7 @@ COPY requirements.txt /
 RUN pip3 install -r /requirements.txt
 
 COPY kube_ops_view /kube_ops_view
+RUN sed -i "s/__version__ = .*/__version__ = '${VERSION}'/" /kube_ops_view/__init__.py
 
 WORKDIR /
 ENTRYPOINT ["/usr/bin/python3", "-m", "kube_ops_view"]