| FROM ubuntu:focal | |
| ENV DEBIAN_FRONTEND=noninteractive | |
| ENV PKG_DEPS="\ | |
| ca-certificates \ | |
| curl \ | |
| git \ | |
| iproute2 \ | |
| nmap \ | |
| openssh-client \ | |
| unzip \ | |
| xmlstarlet \ | |
| xz-utils \ | |
| " | |
| RUN set -e ;\ | |
| echo 'dash dash/sh boolean false' | debconf-set-selections ;\ | |
| apt update -q=2 ;\ | |
| apt full-upgrade -q=2 --yes ;\ | |
| apt install -q=2 --yes --no-install-recommends ${PKG_DEPS} ;\ | |
| # Set default shell to bash | |
| dpkg-reconfigure -p critical dash ;\ | |
| # Cleanup | |
| apt clean ;\ | |
| rm -rf /var/lib/apt/lists/* /tmp/* | |