Install Pi-Hole without user interaction?

I would like to install Pi-Hole automatically inside Vagrant (VirtualBox).  Therefore, in an automated script, it has to run to box start.  Unfortunately, normally, you have to answer multiple installation questions to install Pi-Hole, e.g., IPv4 or 6, ..., and you need keyboard interaction with the setup (by the user). Is there any way or solution to install it without any interaction?  How can I write it in a Bash script or Vagrantfile?