Avoid stopping build checker because of interactive question

Atsushi Abe · Atsushi Abe · commit 0e3a151e66d7 · 2020-07-15T10:04:06.000+09:00
diff --git a/Dockerfile b/Dockerfile
@@ -1,5 +1,7 @@
 FROM ubuntu:focal
 
+ENV DEBIAN_FRONTEND=noninteractive
+
 RUN apt -q -y update && apt -q -y upgrade && apt -q -y install build-essential automake autoconf libtool pkg-config libicu66 icu-devtools libicu-dev libxml2-dev uuid-dev fuse libfuse-dev libsnmp-dev
 
 COPY entrypoint.sh /entrypoint.sh
