contrib/packaging/docker/ubuntu.template

--- a/contrib/packaging/docker/ubuntu.template	Tue Nov 24 14:47:24 2020 -0500
+++ b/contrib/packaging/docker/ubuntu.template	Tue Nov 24 16:17:16 2020 -0500
@@ -3,6 +3,10 @@
 RUN groupadd -g 1000 build && \
     useradd -u 1000 -g 1000 -s /bin/bash -d /build -m build
 
+ARG DEBIAN_FRONTEND=noninteractive
+
+ENV TZ=%TZ%
+
 RUN apt-get update && apt-get install -y \
   build-essential \
   debhelper \