@electron-forge/maker-deb builds .deb packages, which are the standard package format for Debian-based Linux distributions such as Ubuntu. You can only build the deb target on Linux or macOS machines with the fakeroot and dpkg packages installed.
Configuration options are documented in MakerDebConfigOptions.
{
name: '@electron-forge/maker-deb',
config: {
options: {
maintainer: 'The Forgers',
homepage: 'https://example.com',
icon: 'path/to/icon.svg'
}
}
}