Initial

config.py

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+import os
+from util import Singleton
+
+
+class Config(metaclass=Singleton):
+    TOKEN = os.environ["TOKEN"]
+    GROUP_ID = int(os.environ["GROUP_ID"])
+
+    PG_USER = os.environ["USER"]
+    PG_PASS = os.environ["PASS"]
+    PG_ADDR = os.environ["DB_ADDR"]