FROM ubuntu:20.04
ENV DEBIAN_FRONTEND noniteractive

RUN apt-get -qq update && apt-get -qq -y --no-install-recommends install \
    automake \
    autoconf \
    build-essential \
    cmake \
    git \
    debhelper \
    devscripts \
    bash && \
    apt-get autoclean && \
    rm -rf /var/lib/apt/lists/* && \
    ln -sf /bin/bash /bin/sh