db extension

main.py

@@ -24,10 +24,17 @@ token_path = os.environ.get('TOKEN_PATH', 'tokens/token_rcw.json')
 output_dir = os.environ.get('OUTPUT_DIR', 'data')
 support_address = os.environ.get('SUPPORT_ADDRESS', 'remote.control.world1@gmail.com')
 
+raw_port = os.environ.get('DB_PORT')
+try:
+    port = int(raw_port) if raw_port else 3306
+except ValueError:
+    logger.warning(f"Invalid DB_PORT={raw_port!r}, defaulting to 3306")
+    port = 3306
+
 # Database configuration from environment
 db_config = {
     'host': os.environ.get('DB_HOST'),
-    'port': int(os.environ.get('DB_PORT')),
+    'port': port,
     'user': os.environ.get('DB_USER'),
     'password': os.environ.get('DB_PASSWORD'),
     'database': os.environ.get('DB_NAME')