void appendFile(fs::FS &fs, const char * path, const char * message) {
  //Serial.printf("Appending to file: %s\n", path);
  File file = fs.open(path, FILE_APPEND);
  if (!file) {
    Serial.println("Failed to open file for appending");
    return;
  }
  if (file.print(message)) {
    //Serial.println("Message appended");
  } else {
    Serial.println("Append failed");
  }
  file.close();
}