Добавил базовые handlers

apps/tgbot/handlers/__init__.py

@@ -0,0 +1 @@
+from . import default

apps/tgbot/handlers/default/__init__.py

@@ -0,0 +1,6 @@
+from aiogram import Dispatcher
+
+from .start import start_cmd
+
+def setup(dp: Dispatcher):
+    dp.register_message_handler(start_cmd, commands=['start'])

apps/tgbot/handlers/default/start.py

@@ -0,0 +1,7 @@
+from aiogram.types import Message
+from loguru import logger
+
+
+async def start_cmd(msg: Message):
+    logger.info(f"{msg.from_user.full_name} send /start")
+    await msg.answer("Basic reply")