Create a script for Ubuntu ISO creation

Job ID: 31161717

Budget: $30 – $250 USD

I need to create a script that will download a Ubuntu Server 20.04 iso, open it, add certain package installations and install a root certificate. Then, wrap it back as an iso file.
This has to be 100% scripted, no GUI tools (like cubic).
Related categories: System Admin Linux Ubuntu Bash Scripting DevOps