From 6bf9ce641f802139026cfafbf3abc8493ac55d9f Mon Sep 17 00:00:00 2001
From: Sebastian Bergmann <sb@sebastian-bergmann.de>
Date: Fri, 27 Mar 2020 14:01:46 +0100
Subject: [PATCH] Export DEBIAN_FRONTEND=noninteractive so that updating
 tzdata, for instance, works

---
 Dockerfile | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/Dockerfile b/Dockerfile
index 60dd657..0c95ab5 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,8 @@
 FROM ubuntu:20.04
 
-RUN apt-get update && apt-get install -y \
+RUN export DEBIAN_FRONTEND=noninteractive && \
+    apt-get update && \
+    apt-get install -y \
     autoconf \
     bison \
     flex \