Project 2 [WIP]: Pi-Hole DNS level blocker with sync and recursive DNS

Sources:

1. Craft Computing Video
2. Unbound recursive DNS setup
3. gravity-sync script to sync pi-holes
4. Ultimage Guide on systemd on Raspberry Pi (reference only, nothing in this guide is required to make pi-hole work)

Basic stuff:

1. Start with the automatic installer
2. Use this syncing app in a docker container to automatically sync instances.