Fix .env overrides being ignored by loading dotenv before app.env (#126)

Author: PeterDaveHello

main.py

@@ -2,6 +2,9 @@
 import logging
 import os
 
+# Load .env file before importing app.env to ensure environment variables are available
+load_dotenv()
+
 from slack_bolt import App, BoltContext
 from slack_sdk.web import WebClient
 from slack_sdk.http_retry.builtin_handlers import RateLimitErrorRetryHandler
@@ -22,8 +25,6 @@
 )
 from app.slack_ui import build_home_tab
 
-load_dotenv()
-
 if __name__ == "__main__":
     from slack_bolt.adapter.socket_mode import SocketModeHandler