Simple Vagrant File - Create a VM with Ubuntu OS

Vagrantfile

# -*- mode: ruby -*-
# vi: set ft=ruby :

$install_docker_script = <<SCRIPT
echo "Installing dependencies ..."
sudo apt-get update
echo Installing Docker...
curl -sSL https://get.docker.com/ | sh
sudo usermod -aG docker vagrant
SCRIPT

BOX_NAME = "alvistack/ubuntu-18.04"
MEMORY = "512"
MACHINES = 1
IP = "192.168.56.1"
CPUS = 2
VAGRANTFILE_API_VERSION = "2"

Vagrant.configure(VAGRANTFILE_API_VERSION) do |config|
    #Common setup
    config.vm.box = BOX_NAME
    config.vm.synced_folder ".", "/vagrant"
    config.vm.provision "shell",inline: $install_docker_script, privileged: true
    config.vm.provider "virtualbox" do |vb|
      vb.memory = MEMORY
      vb.cpus = CPUS
    end
    
    (1..MACHINES).each do |i|
        config.vm.define "machine#{i}" do |manager|
          manager.vm.network :private_network, ip: "#{IP}#{i}"
          manager.vm.hostname = "machine#{i}"
          if i == 1
            manager.vm.network :forwarded_port, guest: 80, host: 80
          end
        end
    end
end