getAppInfo method

Implementation

Future<void> getAppInfo() async {
  if(Firebase.apps.isNotEmpty) {
    appInfo = await AppInfoFirestore().retrieve();
    lastStableVersion = appInfo.version;
    lastStableBuild = appInfo.build;
    logger.i(appInfo.toString());
  } else {
    logger.w("Firebase not initialized, cannot retrieve app info.");
    lastStableVersion = "0.0.0";
    lastStableBuild = 0;
  }

}