This creates two containers connected over a Wireguard tunnel.
From the `getty` container that comes up you can connect to the
Nginx server via an encrypted tunnel with
```
wget -O - http://192.168.2.1
```
You can use `nsenter` to check out the other namespaces. There is no
external connectivity in either the `getty` or `nginx` containers,
so the only available networking is through the wireguard tunnel.
Signed-off-by: Justin Cormack <justin.cormack@docker.com>