Install some packages into a Docker image

Dockerfile

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+FROM ubuntu:rolling
+
+COPY scripts/docker-install.bash /tmp/
+RUN /tmp/docker-install.bash

scripts/docker-install.bash

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+#!/usr/bin/env bash
+
+set -e
+set -o pipefail
+
+packages="
+
+# Handy utilities
+bsdmainutils
+curl
+emacs-nox
+git
+make
+nano
+vim
+wget
+
+# C/C++
+clang
+
+# Haskell
+cabal-install
+ghc
+
+# Node.js
+nodejs
+npm
+
+# Python
+python3
+python3-pip
+python3-venv
+
+"
+
+export DEBIAN_FRONTEND=noninteractive
+apt-get update
+apt-get install -y $(grep -v "^#" <<< "$packages")
+rm -rf /var/lib/apt/lists/*
+
+rm "$0"