Allow logger configuration ingestion from environment

Related-PROD: PRODX-11433
Change-Id: Ib7b9940d097cf5a6d1c774fa5b6c51feb684d660
diff --git a/sf_notifier/settings/production.py b/sf_notifier/settings/production.py
index dfc9639..e0450c8 100644
--- a/sf_notifier/settings/production.py
+++ b/sf_notifier/settings/production.py
@@ -23,14 +23,10 @@
         }
     },
     'loggers': {
-        'sf_notifier.server': {
-            'level': 'INFO',
+        logger: {
+            'level': os.getenv('LOGGER_LEVEL', 'INFO').upper(),
             'handlers': ['file', 'wsgi']
-        },
-        'sf_notifier.salesforce.client': {
-            'level': 'INFO',
-            'handlers': ['file', 'wsgi']
-        }
+        } for logger in ['sf_notifier.server', 'sf_notifier.salesforce.client']
     }
 }