Added conditional env loading.

Making it work in both dev and production without changing .env files.

ref-test/app/config.py

@@ -1,6 +1,10 @@
 import os
 from pathlib import Path
 
+if not os.getenv('DATA'):
+    from dotenv import load_dotenv
+    load_dotenv('../.env')
+
 class Config(object):
     APP_HOST = '0.0.0.0'
     DATA = os.getenv('DATA')