document the final apu install procedure (team#41058)

Then the automated installer was fired:

    ./install -H root@192.168.0.145 \

              --fingerprint a3:d0:d2:49:76:a9:b0:ee:0d:95:38:12:74:eb:08:f3  \

              --fingerprint 3a:4d:dd:91:79:af:4e:c4:17:e5:c8:d2:d6:b5:92:51   \

              --verbose \

              hetzner-robot \

              --fqdn=dal-rescue-01.torproject.org \

              --fai-disk-config=installer/disk-config/dal-rescue \

              --package-list=installer/packages \

              --post-scripts-dir=installer/post-scripts/ \

              --ipv4-address 192.168.0.45 \

              --ipv4-address 204.8.99.100 \

              --ipv4-subnet 24 \

              --ipv4-gateway 192.168.0.1

              --ipv4-gateway 204.8.99.1

Note that IP configuration was actually performed manually on the

node, the above is just an example of the IP address used by the box.

Next, the [new-machine](howto/new-machine) procedure was followed.

## Upgrades