Dockerfile

@@ -7,7 +7,7 @@ COPY . .
 RUN make build
 
 WORKDIR /go
-RUN tar cfz go-src.tgz src && du -sh *
+RUN tar cvfz go-src.tgz src && du -sh *
 
 # this container doesn't do anything except hold the build artifact
 # and make sure it compiles.