To set the SSH key, run the following with user (not root):
export GH_TOKEN='{token}' # optional
sh -c "$(curl -fsSL https://pdbg.github.io/arch/ssh_key)"
On an Arch-based distribution as root, run the following:
sh -c "$(curl -fsSL https://pdbg.github.io/arch/install)"
That's it.