feat: Update readme.md

Update readme.md with better instructions.

Phonon-40M-es/main.py

@@ -1,8 +1,18 @@
+import os
+from pathlib import Path
+from dotenv import load_dotenv
 import ptts
 import sounddevice as sd
 import numpy as np
 import huggingface_hub as hf
 
+#Load Token for HuggingFace.
+load_dotenv(dotenv_path=Path(__file__).with_name(".env"))
+
+if not os.environ.get("HF_TOKEN", "").strip():
+    raise RuntimeError(
+        "HF_TOKEN is not set. Add your Hugging Face token to a .env file."
+    )
 
 def main():
     print("Cargando el modelo Phonon TTS...")