Hi,
There are detailed instructions at https://webwork.maa.org/wiki/Installation_Manual_for_2.15_on_Ubuntu_20.04_Server
If you will be setting up a virtual machine, you can download the virtual machine which has been tested on VMware, VirtualBox and QEMU/KVM. See https://webwork.maa.org/wiki/Installing_from_WW2.15_Ubuntu20.04_Server_Virtual_Machine_Image