The Electron Release Server target publishes all your artifacts to a hosted instance of Electron Release Server.
Please note that Electron Release Server is a community powered project and is not associated with Electron Forge or the Electron project directly.
Configuration options are documented in PublisherERSConfig
{name: '@electron-forge/publisher-electron-release-server',config: {baseUrl: 'https://update.server.com',username: 'admin',password: 'admin'}}