doc: breadcrumbs for DecentCI backup agent in mmli2 staging

Author: bodom0015

chart/values.mmli2.staging.yaml

@@ -242,12 +242,13 @@ extraDeploy:
           type: postgresql
           host: mmli-backend-staging-postgresql.staging.svc.cluster.local
           auth:
-            username: mmli
+            username: postgres
             database: mmli
             passwordKey: postgres-password
             existingSecret: mmli-backend-postgresql
     global: |
       enabled: false
+      agent-enabled: false
       backup-nfs-path: /taiga/ncsa/radiant/bbfp/mmli2/backups/staging/mmli-backend
       backup-nfs-server: taiga-nfs.ncsa.illinois.edu