feat: config auto load

app.py

@@ -1,10 +1,12 @@
+import config
 from channel import channel_factory
 
 if __name__ == '__main__':
+    # load config
+    config.load_config()
+
     # create channel
     channel = channel_factory.create_channel("wx")
 
     # startup channel
     channel.startup()
-
-    print("Hello bot")