diff --git a/Dockerfile b/Dockerfile
index 52cfff6..47afe0d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,8 @@
 FROM ubuntu:20.04
 
 # install and configure munin
-ARG DEBIAN_FRONTEND=noninteractive# hadolint ignore=DL3008
+ARG DEBIAN_FRONTEND=noninteractive
+# hadolint ignore=DL3008
 RUN apt-get update -qq \
     && apt-get install -y -qq cron munin nginx apache2 wget libapache2-mod-fcgid libcgi-fast-perl ssmtp mailutils curl tzdata autoconf --no-install-recommends \
     && apt-get clean \