async refactor & docker deploy environment

handlers/add_channel.py

@@ -1,17 +1,18 @@
 from telegram import Update
 from telegram.ext import ContextTypes
-from db import SessionLocal
+from db import AsyncSessionLocal
 from models import Channel
 
 async def add_channel(update: Update, context: ContextTypes.DEFAULT_TYPE):
-    args = context.args
+    args = context.args or []
+    if update.message is None:
+        return
     if len(args) < 2:
         await update.message.reply_text('Используйте: /add_channel <название> <ссылка>')
         return
     name, link = args[0], args[1]
-    session = SessionLocal()
-    channel = Channel(name=name, link=link)
-    session.add(channel)
-    session.commit()
-    session.close()
+    async with AsyncSessionLocal() as session:
+        channel = Channel(name=name, link=link)
+        session.add(channel)
+        await session.commit()
     await update.message.reply_text(f'Канал "{name}" добавлен.')