add a bit in config file to help getting the right path.

Author: Hagellach37

cfg/your_config_file.cfg

@@ -10,7 +10,7 @@
   "auth_domain": "your_firebase_auth_domain",
   "database_url": "your_firebase_database_url",
   "storage_bucket": "your_firebase_storage_bucket",
-  "service_account": "your_firebase_service_account_file"
+  "service_account": "./cfg/your_firebase_service_account_file"
   },
 "imagery":{
   "bing": "your_bing_api_key",