Annotate container image with github source

closes #390

Signed-off-by: Guillaume Berche <guillaume.berche@orange.com>
Co-authored-by: Erik Godding Boye <egboye@gmail.com>
Signed-off-by: Guillaume Berche <guillaume.berche@orange.com>

Dockerfile

@@ -26,6 +26,7 @@ RUN make cli
 
 # release image with kubectl + kuttl
 FROM registry.access.redhat.com/ubi8/ubi-minimal:latest
+LABEL org.opencontainers.image.source="https://github.com/kudobuilder/kuttl"
 
 RUN microdnf install vim tar gzip
 RUN echo 'alias vi=vim' >> ~/.bashrc