StatefulSet does not specify image tag

Gatekeeper prevents me from currently deploying this chart because the StatefulSet doesn't specify an image tag, we are currently only providing the repository value.

I believe ./chart/tempaltes/statefulset.yaml:37 should emulate what the Jira chart is doing and go from

- name: confluence image: {{ .Values.image.repository }}

to

- name: confluence image: {{ include "confluence.image" . | quote }}