src/vs/workbench/electron-sandbox/sandbox.simpleservices.ts/initFileSystem
export async function initFileSystem(environmentService: INativeWorkbenchEnvironmentService, fileService: IFileService): Promise<void> {
	await fileService.createFolder(environmentService.userHome);
	await fileService.createFolder(environmentService.tmpDir);

	const userData = URI.file(environmentService.userDataPath);
	await fileService.writeFile(joinPath(userData, 'User', 'settings.json'), VSBuffer.fromString(JSON.stringify({
		'window.zoomLevel': 1,
		'workbench.colorTheme': 'Default Light+',
	}, undefined, '\t')));

	await fileService.writeFile(joinPath(userData, 'User', 'keybindings.json'), VSBuffer.fromString(JSON.stringify([
		{
			'key': 'f12',
			'command': 'workbench.action.toggleDevTools'
		}
	], undefined, '\t')));
}