Black checker complains about invalid usage of None
nsfarm/lxd/container.py:143: error: Item "None" of "Optional[NetworkInterface]" has no attribute "addresses"
nsfarm/lxd/container.py:144: error: Item "None" of "Optional[NetworkInterface]" has no attribute "interfaces"
nsfarm/web/container.py:62: error: Item "None" of "Optional[NetworkInterface]" has no attribute "proxy"