Since electron-builder 21 desktop integration is not a part of produced AppImage file. AppImageLauncher is the recommended way to integrate AppImages.
licenseString - The path to EULA license file. Defaults to
eula.txt(or uppercase variants). Only plain text is supported.
synopsisString - The short description.
descriptionString - As description from application package.json, but allows you to specify different for Linux.
categoryString - The application category.
mimeTypesArray<String> - The mime types in addition to specified in the file associations. Use it if you don’t want to register a new mime type, but reuse existing.
desktopany - The Desktop file entries (name to value).