fix: load env in app.py

Author: mwbrooks

app.py

@@ -1,12 +1,17 @@
 import os
 import logging
 
+from dotenv import load_dotenv
+
 from slack_bolt import App
 from slack_bolt.adapter.socket_mode import SocketModeHandler
 from slack_sdk import WebClient
 
 from listeners import register_listeners
 
+# Load environment variables
+load_dotenv(dotenv_path=".env", override=False)
+
 # Initialization
 logging.basicConfig(level=logging.DEBUG)