fix(config): added default value to celery result and broker

rhodecode/config/config_maker.py

@@ -152,6 +152,10 b' def sanitize_settings_and_apply_defaults'
         parser='file:ensured'
     )
 
+    # celery
+    broker_url = settings_maker.make_setting('celery.broker_url', 'redis://redis:6379/8')
+    settings_maker.make_setting('celery.result_backend', broker_url)
+
     settings_maker.make_setting('exception_tracker.send_email', False, parser='bool')
     settings_maker.make_setting('exception_tracker.email_prefix', '[RHODECODE ERROR]', default_when_empty=True)