Notification service to run side to side with naas. Allow naas to send status to user and custom notifications.
EMAIL_SECURE ssl or not .
EMAIL_USER email to connect smtp server
EMAIL_PASSWORD password to connect smtp server
EMAIL_HOST host to connect smtp server
SENTRY_DSN to connect sentry
HUB_HOST => hostname of the deployed jupyter hub instance
HUB_DB => 'sqlite::memory:' or postgressuri 'postgres://user:pass@example.com:5432/dbname'
ADMIN_TOKEN => set to any id you want, it allow you to send email without specific jupyter user