FROM ubuntu:21.04

ENV DEBIAN_FRONTEND=noninteractive
RUN sed -i 's/deb.debian.org/ftp.cz.debian.org/' /etc/apt/sources.list
RUN apt-get -y update
RUN apt-get -y upgrade
RUN apt-get -y install \
        autoconf \
        build-essential \
        flex \
        bison \
        ncurses-dev \
        libreadline-dev