cluster-config/apps/forgejo/app/postgres.yaml

apiVersion: kubegres.reactive-tech.io/v1
kind: Kubegres
metadata:
  name: forgejo-db
  namespace: forgejo
spec:
   replicas: 1
   image: postgres:16-alpine
   database:
      size: 5Gi
   env:
      - name: POSTGRES_PASSWORD
        valueFrom:
           secretKeyRef:
              name: postgres-secret
              key: superUserPassword

      - name: POSTGRES_REPLICATION_PASSWORD
        valueFrom:
           secretKeyRef:
              name: postgres-secret
              key: replicationUserPassword