No network on a droplet created from a custom Ubuntu 20.04 image

Hello,

I have created a custom image - Ubuntu 20.04 LTS on Virtualbox following the Digital Ocean instructions (https://www.digitalocean.com/community/tutorials/how-to-create-a-digitalocean-droplet-from-an-ubuntu-iso-format-image) to configure the cloud-init and datasources and have exported it.

When I import it and create a droplet from it, I cannot SSH into it and when using the console there is no network i.e. cannot ping a web address (Temporary failure in name resolution) or 8.8.8.8 (Network is unreachable).

When I run the commands: sudo ifconfig eth0 207.154.193.4 netmask 255.255.240.0 up

ip route add default via 207.154.192.1

And add 8.8.8.8 into the /etc/resolv.conf file it all works and I can ssh into the server.

Should I have to do all this? What stage have I done something wrong?

Thanks