root: update readme

docs/installation/kubernetes.md

@@ -1,3 +1,61 @@
 # Kubernetes
 
 For a mid to high-load Installation, Kubernetes is recommended. passbook is installed using a helm-chart.
+
+```
+# Default values for passbook.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+# passbook version to use. Defaults to latest stable version
+# image:
+#   tag:
+
+nameOverride: ""
+
+config:
+  # Optionally specify fixed secret_key, otherwise generated automatically
+  # secret_key: _k*@6h2u2@q-dku57hhgzb7tnx*ba9wodcb^s9g0j59@=y(@_o
+  # Enable error reporting
+  error_reporting: false
+  # Log level used by web and worker
+  # Can be either debug, info, warning, error
+  log_level: warning
+
+# This Helm chart ships with built-in Prometheus ServiceMonitors and Rules.
+# This requires the CoreOS Prometheus Operator.
+monitoring:
+  enabled: false
+
+# Enable Database Backups to S3
+# backup:
+#   access_key: access-key
+#   secret_key: secret-key
+#   bucket: s3-bucket
+#   host: s3-host
+
+ingress:
+  enabled: false
+  annotations: {}
+    # kubernetes.io/ingress.class: nginx
+    # kubernetes.io/tls-acme: "true"
+  path: /
+  hosts:
+    - passbook.k8s.local
+  tls: []
+  #  - secretName: chart-example-tls
+  #    hosts:
+  #      - passbook.k8s.local
+
+# These settings configure the packaged PostgreSQL and Redis chart.
+postgresql:
+  postgresqlDatabase: passbook
+
+redis:
+  cluster:
+    enabled: false
+  master:
+    persistence:
+      enabled: false
+    # https://stackoverflow.com/a/59189742
+    disableCommands: []
+```