Defer db initialization for testing

lc/config.py

@@ -2,5 +2,4 @@ import os
 
 import playhouse.sqlite_ext
 
-DB_LOC=os.getenv('SCRAPBOARD', 'test.db')
-DB=playhouse.sqlite_ext.SqliteExtDatabase(DB_LOC)
+DB=playhouse.sqlite_ext.SqliteExtDatabase(None)