hack: sync with master branch (needed for release)

Signed-off-by: Gyuho Lee <gyuhox@gmail.com>

hack/scripts-dev/docker-dns-srv/Dockerfile

@@ -33,16 +33,12 @@ ENV GO_DOWNLOAD_URL https://storage.googleapis.com/golang
 RUN rm -rf ${GOROOT} \
   && curl -s ${GO_DOWNLOAD_URL}/go${GO_VERSION}.linux-amd64.tar.gz | tar -v -C /usr/local/ -xz \
   && mkdir -p ${GOPATH}/src ${GOPATH}/bin \
-  && go version
+  && go version \
+  && go get -v -u github.com/mattn/goreman
 
 RUN mkdir -p /var/bind /etc/bind
 RUN chown root:bind /var/bind /etc/bind
-ADD Procfile /Procfile
-ADD run.sh /run.sh
 
 ADD named.conf etcd.zone rdns.zone /etc/bind/
 RUN chown root:bind /etc/bind/named.conf /etc/bind/etcd.zone /etc/bind/rdns.zone
 ADD resolv.conf /etc/resolv.conf
-
-RUN go get github.com/mattn/goreman
-CMD ["/run.sh"]