adding bot.py for bot logic

bot.py

@@ -0,0 +1,17 @@
+import os
+
+_bot = None
+
+def get_bot():
+    global _bot
+    if _bot is None:
+        import telebot
+        BOT_TOKEN = os.environ.get("BOT_TOKEN")
+        _bot = telebot.TeleBot(BOT_TOKEN)
+        
+        # Register handlers
+        @_bot.message_handler(commands=["start"])
+        def start(message):
+            _bot.reply_to(message, "Welcome!")
+    
+    return _bot