Sentry Caches Settings

We deploy onpremise sentry using helm chart GitHub - sentry-kubernetes/charts: Easily deploy Sentry on your Kubernetes Cluster
memcached is currently commented out and we need a way to set this up. The helm values file does not allow us to do this, any ideas?

CACHES = {
‘default’: {
‘BACKEND’: ‘django.core.cache.backends.filebased.FileBasedCache’,
‘LOCATION’: ‘/var/tmp/django_cache’,
}
}