#!/bin/bash # Environment variables with flags NODE_EXPORTER="${NODE_EXPORTER:-0}" while getopts ":e:" opt; do case $opt in e) NODE_EXPORTER="1";; \?) echo "Invalid option: -$OPTARG" >&2 exit 1 ;; :) echo "Option -$OPTARG requires an argument." >&2 exit 1 ;; esac done apt update apt upgrade -y # Docker installation # Add Docker's official GPG key: apt install ca-certificates curl -y install -m 0755 -d /etc/apt/keyrings curl -fsSL https://download.docker.com/linux/debian/gpg -o /etc/apt/keyrings/docker.asc chmod a+r /etc/apt/keyrings/docker.asc # Add the repository to Apt sources: tee /etc/apt/sources.list.d/docker.sources <