Update Dockerfile entrypoint (#210)

Author: dvaldivia

Dockerfile

@@ -23,4 +23,4 @@ EXPOSE 9090
 COPY --from=0 /etc/ssl/certs/ca-certificates.crt /etc/ssl/certs/
 COPY --from=0 /go/src/github.com/minio/console/console .
 
-CMD ["/console"]
+ENTRYPOINT ["/console"]