misc: update helm chart configs and readme (#1751)

* fix wiki helm

* update readme

* include service account as a stub

* use lightweight healthz for readiness and health endpoint

* remove if block for setting DB_TYPE, only postgres is supported in this chart for now

dev/helm/Chart.yaml

@@ -1,7 +1,11 @@
-apiVersion: v1
-name: Wiki.js
-version: 2.0.0
-appVersion: 2.0.0
+apiVersion: v2
+name: wiki
+# This is the chart version. This version number should be incremented each time you make changes
+# to the chart and its templates, including the app version.
+version: 2.0.1
+# This is the version number of the application being deployed. This version number should be
+# incremented each time you make changes to the application.
+AppVersion: latest
 description: The most powerful and extensible open source Wiki software.
 keywords:
   - wiki
@@ -10,6 +14,20 @@ keywords:
   - docs
   - reference
   - editor
+# A chart can be either an 'application' or a 'library' chart.
+#
+# Application charts are a collection of templates that can be packaged into versioned archives
+# to be deployed.
+#
+# Library charts provide useful utilities or functions for the chart developer. They're included as
+# a dependency of application charts to inject those utilities and functions into the rendering
+# pipeline. Library charts do not define any templates and therefore cannot be deployed.
+type: application
+dependencies:
+  - name: postgresql
+    version: 6.5.0
+    repository: https://kubernetes-charts.storage.googleapis.com/
+    condition: postgresql.enabled
 home: https://wiki.js.org
 icon: https://github.com/Requarks/wiki/raw/master/client/static/favicons/android-chrome-192x192.png
 sources:
@@ -18,4 +36,7 @@ maintainers:
   - name: Nicolas Giard
     email: github@ngpixel.com
     url: https://github.com/NGPixel
+  - name: James Greenhill
+    email: james@fuziontech.net
+    url: https://github.com/fuziontech
 engine: gotpl