From c3e7ecc7731f621794391b3e5ba5582e86cd555f Mon Sep 17 00:00:00 2001
From: j-marz <j-marz@users.noreply.github.com>
Date: Wed, 24 Jul 2019 22:48:59 +1000
Subject: [PATCH] Replace ENV with ARG for DEBIAN_FRONTEND (#1180)

Best practice suggests not using ENV for this setting as it persists after build. ARG is only set during build.
---
 Dockerfile | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 64f19a38..469c70cf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM debian:stretch-slim
 LABEL maintainer="Thomas VIAL"
 
-ENV DEBIAN_FRONTEND noninteractive
+ARG DEBIAN_FRONTEND=noninteractive
 ENV VIRUSMAILS_DELETE_DELAY=7
 ENV ONE_DIR=0
 ENV ENABLE_POSTGREY=0