* How to add a new VPN Host
** Install wireguard to the host
** Install uncloud to the host
** Add `python manage.py vpn --hostname fqdn-of-this-host` to the crontab
** Use the CLI to configure one or more VPN Networks for this host
* Example of adding a VPN host at ungleich
** Create a new dual stack alpine VM
** Add it to DNS as vpn-XXX.ungleich.ch
** Route a /40 network to its IPv6 address
** Install wireguard on it
** TODO Enable wireguard on boot
** TODO Create a new VPNPool on uncloud with
*** the network address (selecting from our existing pool)
*** the network size (/...)
*** the vpn host that provides the network (selecting the created VM)
*** the wireguard private key of the vpn host (using wg genkey)
*** http command
```
http -a nicoschottelius:$(pass
  ungleich.ch/nico.schottelius@ungleich.ch)
  http://localhost:8000/admin/vpnpool/ network=2a0a:e5c1:200:: \
  network_size=40 subnetwork_size=48
  vpn_hostname=vpn-2a0ae5c1200.ungleich.ch
  wireguard_private_key=...
```
* Example http commands / REST calls
** creating a new vpn pool
 http -a nicoschottelius:$(pass
 ungleich.ch/nico.schottelius@ungleich.ch)
 http://localhost:8000/admin/vpnpool/ network_size=40
 subnetwork_size=48 network=2a0a:e5c1:200::
 vpn_hostname=vpn-2a0ae5c1200.ungleich.ch wireguard_private_key=$(wg
 genkey)
** Creating a new vpn network