Please add support of TZ for installations need TZ another than UTC
Possible solution is to install tzdata, and reconfigure TZ via dpkg-reconfigure tzdata
FROM ubuntu:focal
MAINTAINER BIND 9 Developers <bind9-dev@isc.org>
ENV DEBIAN_FRONTEND noninteractive
ENV LC_ALL C.UTF-8
# New lines started
ENV TZ "Europe/Kiev"
# New lines finished
ARG DEB_VERSION=1:9.16.33-1+ubuntu20.04.1+isc+1
# Install add-apt-repository command
RUN apt-get -qqqy update
RUN apt-get -qqqy dist-upgrade
RUN apt-get -qqqy install --no-install-recommends apt-utils software-properties-common dctrl-tools gpg-agent
# New lines started
RUN apt-get install -yq tzdata
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
# New lines finished
Thanks