FROM ubuntu:focal

ENV DEBIAN_FRONTEND=noninteractive
ENV http_proxy=http://acng.grote.lan:9999

# hadolint ignore=DL3008,DL3028
RUN apt-get update && \
	apt-get -y --no-install-recommends install \
		build-essential \
		wget \
		rsync \
		openssh-client \
		git \
		curl \
	&& apt-get clean && \
	rm -rf /var/lib/apt/lists/* /var/tmp/* /tmp/*