`kraft.cloud.yaml`: Add networking support

[razvand]

Add networking support to kraft.cloud.yaml, to enable full features of Python support (such as running the http.server module).

This will require a different way of running the Unikernel image. Use the following commands to run the http.server module:

rm -fr fs0
mkdir fs0
tar -C fs0 -xf rootfs.tar.gz
sudo ~/kraftkit/dist/kraft net rm kraft0
sudo ~/kraftkit/dist/kraft net create -n 172.44.0.1/24 kraft0
sudo kraft run --log-type basic --log-level debug --kraftfile kraft.cloud.yaml --plat firecracker --network bridge:kraft0 --initrd ./fs0 -M 256M -a netdev.ipv4_addr=172.44.0.2 -a netdev.ipv4_gw_addr=172.44.0.1 -a netdev.ipv4_subnet_mask=255.255.255.0 -- "-m http.server 8080"

To run helloworld.py, use:

rm -fr fs0
mkdir fs0
tar -C fs0 -xf rootfs.tar.gz
sudo ~/kraftkit/dist/kraft net rm kraft0
sudo ~/kraftkit/dist/kraft net create -n 172.44.0.1/24 kraft0
cp helloworld.py fs0/
sudo kraft run --log-type basic --log-level debug --kraftfile kraft.cloud.yaml --plat firecracker --network bridge:kraft0 --initrd ./fs0 -M 256M -- "helloworld.py"