settings(minor): use cached_db for session, use localhost as domain

passbook/lib/default.yml

@@ -16,7 +16,7 @@ debug: false
 # Error reporting, sends stacktrace to sentry.services.beryju.org
 error_report_enabled: true
 
-domain: passbook.local
+domain: localhost
 
 passbook:
   sign_up:

passbook/root/settings.py

@@ -117,7 +117,7 @@ CACHES = {
 }
 DJANGO_REDIS_IGNORE_EXCEPTIONS = True
 DJANGO_REDIS_LOG_IGNORED_EXCEPTIONS = True
-SESSION_ENGINE = "django.contrib.sessions.backends.cache"
+SESSION_ENGINE = "django.contrib.sessions.backends.cached_db"
 SESSION_CACHE_ALIAS = "default"
 
 MIDDLEWARE = [