update Dockerfile

Author: eksrha

docker-image/Dockerfile

@@ -3,15 +3,13 @@ FROM debian:buster-slim
 ENV DEBIAN_FRONTEND noninteractive
 ENV LC_ALL C.UTF-8
 
-ARG BIND_VERSION=9.16.24
-
 ###
 ### Install
 ###
 RUN set -x \
-	&& apt-get -qqqy update \
-	&& apt-get  -qqqy install --no-install-recommends --no-install-suggests -y \
-		bind9=$BIND_VERSION \
+	&& apt-get update \
+	&& apt-get install --no-install-recommends --no-install-suggests -y \
+		bind9 \
 		dnsutils \
 		iputils-ping \
 	&& apt-get purge -y --auto-remove -o APT::AutoRemove::RecommendsImportant=false $fetchDeps \