Add production settings + correct setting sandbox_enabled

Change-Id: I92bd99676fe0d3b4bc0de10e180e5a2e82ab2ef7
Related-bug: PROD-24880 (PROD:24880)
diff --git a/sf_notifier/vars/production b/sf_notifier/vars/production
new file mode 100644
index 0000000..85d050b
--- /dev/null
+++ b/sf_notifier/vars/production
@@ -0,0 +1,4 @@
+export FLASK_APP=sf_notifier/server.py
+export FLASK_ENV=production
+
+export SIMPLE_SETTINGS=sf_notifier.settings.production