[Feature proposal] Automate Tangobox building

[mliszcz]

VM creation process is quite time-consuming. One needs to manually create the VM, install OS, run all the scripts, type sudo passwords, press y, y, y, etc ... .

We could automate it, so that unattended installation will be possible. I propose following steps:

• Use vagrant to spin-up the VM (https://app.vagrantup.com/ubuntu/boxes/bionic64),
• Use shell script provisioning (so that we can keep current scripts/),
• Make the scripts/ idempotent,
• Change the scripts/ to allow for an unattended installation.