feat: Dockerize application and add MySQL logging

This commit introduces Docker and Docker Compose to containerize the application and orchestrate it with a MySQL database.

Key changes include:
- Added a `Dockerfile` to create a container for the Python bot.
- Created a `docker-compose.yml` file to manage the bot and MySQL services.
- Added a `modules/database.py` module to handle database connections and logging with SQLAlchemy.
- Integrated request logging into all command handlers.
- Updated `requirements.txt` with necessary dependencies for MySQL.
- Updated `.env` and `.gitignore` to manage database credentials securely.
- Updated `Readme.md` with instructions on how to run the application using Docker Compose.

modules/onboarding.py

@@ -17,6 +17,8 @@ from telegram.ext import (
     Defaults,
 )
 
+from modules.database import log_request
+
 # --- 1. CARGA DE ENTORNO ---
 load_dotenv()  # Carga las variables del archivo .env
 TOKEN = os.getenv("TELEGRAM_TOKEN")
@@ -115,6 +117,7 @@ TECLADO_RELACION_EMERGENCIA = ReplyKeyboardMarkup(
 async def start(update: Update, context: ContextTypes.DEFAULT_TYPE) -> int:
     user = update.effective_user
     context.user_data.clear()
+    log_request(user.id, user.username, "welcome", update.message.text)
     
     context.user_data["metadata"] = {
         "telegram_id": user.id,