dockerfile

FROM ubuntu:20.04

RUN apt update && apt -y upgrade
RUN apt update && apt -y upgrade

ARG DEBIAN_FRONTEND=noninteractive

RUN apt install -y ubuntu-minimal
RUN apt install -y ubuntu-standard
RUN apt install -y ubuntu-server

RUN apt install -y \
  colordiff \
  tree

RUN apt-get clean
RUN rm -rf /var/lib/apt/lists/*

RUN locale-gen en_US.UTF-8
ENV LANG en_US.UTF-8
ENV LANGUAGE en_US:en
ENV LC_ALL en_US.UTF-8

RUN useradd \
  --create-home \
  --groups sudo \
  --shell /bin/bash \
  worker
RUN echo 'worker:worker' | chpasswd

USER worker
RUN mkdir /home/worker/Desktop
WORKDIR /home/worker/Desktop