Add db module

config/payouts.properties

@@ -20,3 +20,12 @@ Log.FilePath = ./logs/payouts.log
 Log.TextOutput = false
 Log.StdoutEnabled = true
 Log.FileEnabled = false
+
+# type: sqlite, postgres
+Database.Type =
+# connection string:
+#   sqlite: flibooks.db
+#   postgres: host=127.0.0.1 user=gorm password=gorm dbname=gorm port=5432 sslmode=disable
+Database.Connection =
+# DB log level
+Database.LogLevel = Info